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  • 1001.
    Stillström, Carin
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Produktionssystem.
    Jackson, Mats
    Mälardalens Högskola.
    The concept of mobile manufacturing2007In: Journal of manufacturing systems, ISSN 0278-6125, E-ISSN 1878-6642, Vol. 26, no 3-4, p. 188-193Article in journal (Refereed)
    Abstract [en]

    It is increasingly important to locate manufacturing activities close to the most relevant competence or the most interesting market. The possibility to easily and quickly move manufacturing capacity is thus becoming more important. Hence, the demand for mobile manufacturing has increased and requires solutions for a quick, rational, and economical reconfiguration of the production system. Within the research project Factory-in-a-Box, the concept of mobile manufacturing has been investigated through the development and implementation of five operative demonstrators. This paper will analyze the concept of mobile manufacturing by presenting the results from the Factory-in-a-Box research project and its demonstrator development. The objective is to clarify when mobile manufacturing capacity can be a proper solution to use as well as to discuss future possible industrial manufacturing applications. The results show that there is a large range of applications for the concept of mobile manufacturing and that two dimensions – the geographical distance and the organizational distance – can be used to classify the mobility within manufacturing systems.

     

  • 1002.
    Stillström, Carin
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Jackson, Mats
    Mälardalens Högskola.
    The concept of mobile manufacturing2007In: Journal of manufacturing systems, ISSN 0278-6125, E-ISSN 1878-6642, Vol. 26, no 3-4, p. 188-193Article in journal (Refereed)
    Abstract [en]

     

    It is increasingly important to locate manufacturing activities close to the most relevant competence or the most interesting market. The possibility to easily and quickly move manufacturing capacity is thus becoming more important. Hence, the demand for mobile manufacturing has increased and requires solutions for a quick, rational, and economical reconfiguration of the production system. Within the research project Factory-in-a-Box, the concept of mobile manufacturing has been investigated through the development and implementation of five operative demonstrators. This paper will analyze the concept of mobile manufacturing by presenting the results from the Factory-in-a-Box research project and its demonstrator development. The objective is to clarify when mobile manufacturing capacity can be a proper solution to use as well as to discuss future possible industrial manufacturing applications. The results show that there is a large range of applications for the concept of mobile manufacturing and that two dimensions – the geographical distance and the organizational distance – can be used to classify the mobility within manufacturing systems.

     

  • 1003.
    Stjärndahl, Rickard
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Aronsson, Tobias
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Problemanalys vid Aros Quality Group Enclosure Systems AB2006Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    The aim of this report is to increase the knowledge and understanding of the problems within the production at AQ Enclosure systems, and thereby achieve a more stable flow throughout the whole process, a better working environment and better competition advantages. The internal flow along with the external cooperation is very important for the company, because it views flexibility and short leadtime as it is the most important competitive means. The part of AQ production that’s been investigated is the manufacturing of ATM-machines, where the costumer is Banqit. This company is a rater small company with about 4 % of the world market of ATM-machines.

    In order to achieve the aim of the report extensive interviews have been carried out with employees at AQ. Employees in both the administrative part as well as the manufacturing part has been interviewed. The interviews have been conducted in a way were the respondents have had the opportunity to study the questions in advance.

    The survey has given a result which indicates problem over a wide scale. A lot of the company problems do not lie in a particular department; they rather include the whole company. The picture of their problems became more complex whereas different respondents look at the same problems in different ways. One big difference in views was clearly identified between office staff and the producing staff. The problems that emerged were not related to lack of machine capability, the problems were rather linked to the managing of production and organization. One example of this problem is the producing personnel’s lack of knowledge and commitment to the company philosophy. The problems concerning management also reflect in a rather strong feeling that divides the company in two, us and them. This feeling affects the whole production line. The producing personnel feels that the office lack understanding of their everyday work and don’t encourage suggestions concerning process evolvement. One other big problem concerning AQ’s production is that some of their key suppliers are either single source or locked from their costumer Banqit.

    The conclusions of the report shows several areas in which AQ can improve. One measure that the company can implement is introducing a more foreseeable and visual handling of their pallets within the factory. The company management ought to find ways to better mediate the production philosophy throughout the entire organization. Furthermore, the company management should increase the will to see potential ways of improving and increase the inclination of expressing those suggestions. The suggestions should not only concern the personnel’s own workplace but rather span over the entire process. The report also identifies possible areas of improvement concerning the internal and external team cooperation. The different teams ought to see each other as costumers and produce an equally good result regardless of if the item is produced for an internal department or an external costumer.

  • 1004.
    Stjärnström, Dan
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Sundqvist, Andreas
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Effektiviserad lagerstyrning av reservdelar inom hjälpmedelsförsörjning2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose – The purpose of this study is to investigate how to achieve efficient inventory management of spare parts in the health care sector.

    Methodology – To meet the purpose of the study a case study has been conducted in collaboration with Hjälpmedelscentralen at Länssjukhuset Ryhov in Jönköping. The empirical data have been obtained by methods such as interviews and documentation studies. By analysing empirical data in comparison with the theoretical framework the findings of the study was generated.

    Findings – Initially, the findings of the study implies that aspects such as usage frequency, annual dollar volume and criticality are important to consider in inventory management of spare parts in the health care sector. Usage frequency and annual dollar volume have been used as criteria for an assortment wide ABC-classification which resulted in three segments. One of these segments, customer order, has a very low usage frequency. Therefore it was considered appropriate to only order these spare parts when an actual need has occurred. The inventory management of the remaining segments should be carried out with a reorder point system. However, there is a certain difference regarding the intensity of the management between the two segments. Furthermore, it’s appropriate to conduct a classification based on criticality. This should ensure that critical spare parts get more attention and hence decreasing the risk of shortage.

    Implications – In this study, it has been determined how to achieve efficient inventory management of spare parts in the health care sector. For those who aim to do this it’s necessary to identify the aspects that are most important for the particular business. Furthermore, it’s important that these businesses ensure the availability of necessary data.

    Research limitations – The conducted case study was designed as a holistic single case study. Since businesses differ from each other it would have been appropriate to conduct a multiple case study. As a result of this, a higher degree of generalisation could have been achieved.

  • 1005.
    Stolt, Roland
    Jönköping University, School of Engineering, JTH. Research area Computer Supported Engineering Design.
    CAD-Model Parsing for Automated Design and Design Evaluation2008Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Product development has both innovative and analytic sides. Starting from the requirements, a design suggestion is generated. In order to assess how well the envisioned design fulfils the requirements, it is sometimes necessary to build a computer model of it for the analysis. The overall motivation of the work presented is to reduce the time spent on creating the model by reusing knowledge gained from developing similar products by suggesting, building and evaluating IT-systems. To verify the systems real design examples, obtained from companies that have participated in the research projects have been used.

    The work is based on two major application examples. The first, involving the automated geometrical idealisation of die-cast parts (Paper I-III), and the second involving manufacturability of powder metallurgy pressed and sintered parts (Paper IV-VI). The work starts from the point in the product development process where it exists a design suggestion represented as an arbitrary format CAD-model. In the powder metallurgy case the object is to secure that the geometry is suitable for the production process. In the die-casting case the object is to automatically create an idealised version of the model for shell elements meshing. These two tasks have previously been treated as two separate cases, addressed by completely different software. This thesis suggests a common method for addressing the two cases. The method is based on converting the CAD-models, using the geometrical restrictions of the production processes, into a format with a specialised feature structure, parameterisation and construction history using a feature recognition approach. The features are then automatically reconstructed in a target CAD-system. The resulting, specialised CAD-model can be used for automated design and design evaluation purposes, demonstrated in the thesis. The models are therefore called DAR (Design Automation Ready)-models. The DAR-models are useful in that they separate the conversion from the subsequent treatment of the models providing modularisation, flexibility and user insight in the model structure. In that a construction history and parameterisation have be constructed in the target CAD-system, the advanced geometry manipulation and means for knowledge management often provided in modern CAD-systems can be accessed in a transparent and user manageable way. This extends the usefulness of the CAD-systems from involving only interactive work to managing all components sharing the same production process.

  • 1006.
    Stolt, Roland
    Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design.
    Designing Material Standards2012In: Proceedings of DESIGN 2012, the 12th International Design Conference, Dubrovnik, Croatia / [ed] D. Marjanovic, M. Storga, N. Pavkovic & N. Bojcetic, The Design Society, 2012, p. 1133-1140Conference paper (Refereed)
    Abstract [en]

    Material standards are currently developed though building consensus and voting in organisations like ISO and ASME. If these organisations adopted methods from design in the development process of standards, the user perspective could be added greatly improving the usefulness of the standards. This paper attempts to fi nd the user requirements on material standards and evaluates how well it has been met in four different existing standards. The result is that the end user perspective has been forgotten to a varying extent, leaving plenty of room for improvements which is discussed in the paper.

  • 1007.
    Stolt, Roland
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Computer Supported Engineering Design.
    From CAD to FEA: A design automation perspective2006Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    CAD-models of parts produced by injection moulding or die-casting are often complex making the task of automated geometrical idealisation for finite element analysis difficult. Conventional tools for geometric idealisation are not ideal for the task, as will be shown in the thesis. To address the idealisation problem, this thesis proposes a novel method of creating geometric idealisations of CAD-models for finite element analysis. Knowledge about the production and design processes is used to support the idealisations. The key idea is to simplify the idealisation problem by using the fact that die-cast and injection-moulded parts have a clearly defined tooling draft direction. It is primarily the mid-surfaces of the thin-walled geometry that are extracted for shell element meshing. The ideas have been tested by the creation of a CAD-integrated system that reads the construction history tree of the CAD-model and creates an idealised geometry in the same CAD-model automatically. It is also shown how the system can be used for idealising neutral format files by creating a virtual construction history tree in interaction with the user. The system is named CASTING (CAd Supported Tool for Idealisation of Geometry). The overall objective is to save time in the idealisation step, thereby freeing time for more creative work in the design process.

  • 1008.
    Stolt, Roland
    et al.
    Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design.
    André, Samuel
    Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design.
    Elgh, Fredrik
    Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design.
    Andersson, Petter
    GKN Aerospace AB.
    Early stage assessment of the inspectability of welded components: A case from the aerospace industry2016In: Proceedings of the 7th International Swedish Production Symposium, 2016Conference paper (Refereed)
    Abstract [en]

    This paper proposes a method to indicate potential problems when planning dye penetrant and x-ray inspection of welded components. Inspection has been found to be an important part of the manufacturability evaluation made in a large CAD-based parametric environment for making multidisciplinary design simulations in early stages of design at an aircraft component manufacturer. The paper explains how the proposed method is to be included in the design platform at the company. It predicts the expected probability of detection of cracks (POD) in situations where the geometry of the parts is unfavourable for inspection so that potential problems can be discovered and solved in early stages. It is based on automatically extracting information from CAD-models and making a rule-based evaluation. It also provides a scale for how favourable the geometry is for inspection. In the paper it is also shown that the manufacturability evaluation need to take into consideration the expected stresses in the structures, highlighting the importance of multi-disciplinary simulations.

  • 1009.
    Stolt, Roland
    et al.
    Jönköping University, School of Engineering, JTH, Product Development. Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design.
    André, Samuel
    Jönköping University, School of Engineering, JTH, Product Development. Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design.
    Elgh, Fredrik
    Jönköping University, School of Engineering, JTH, Product Development. Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design.
    Andersson, Petter
    GKN Aerospace Sweden, Sweden.
    Introducing Welding Manufacturability in a Multidisciplinary Platform for the Evaluation of Conceptual Aircraft Engine components2017In: International Journal of Product Lifecycle Management, ISSN 1743-5110, E-ISSN 1743-5129, Vol. 10, no 2, p. 107-123Article in journal (Refereed)
    Abstract [en]

    Computer simulations play an important role for evaluating designs in an early stages leading to that more informed decisions can be taken and thereby reducing the risk of costly re-design. In this paper, a platform currently in operation at aeronautical company for doing extensive automated multiobjective design parameter studies on conceptual designs of aircraft engine components is studied. In the paper, an extension of the capability of the platform into making a rule-based evaluation of the welding manufacturability of the conceptual designs is proposed. The extension is tested by a prototype system at the air-craft manufacturer showing the relation between the design parameters and the manufacturability of the components. The results are presented as a manufacturability index showing what trade-offs with other performance criteria of the engine that can be made. It is shown that the manufacturability evaluation can be integrated in the knowledge value stream and supports a set-based concurrent engineering approach in the company.

  • 1010.
    Stolt, Roland
    et al.
    Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design.
    André, Samuel
    Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design.
    Elgh, Fredrik
    Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design.
    Andersson, Petter
    GKN Aerospace AB.
    Manufacturability assessment in the conceptual design of aircraft engines – building knowledge and balancing trade-offs2015In: Product Lifecycle Management in the Era of Internet of Things / [ed] Bouras, A., Eynard, B., Foufou, S., Thoben, K.-D., Springer, 2015, p. 407-417Conference paper (Refereed)
    Abstract [en]

    This paper addresses the automated assessment of manufacturability of air-craft engine components in the early stages of design, focused on the welding process. It is a novel part of a multi-objective decision support tool for design evaluation, currently running at a manufacturer of jet engine components. The paper briefly describes the tool and how it impacts the product development process. Further, the paper presents an integrated method for manufacturability assessment by finding welding processes that complies with all geometrical and other constraints found in the CAD-models of the conceptual engine. Here, preferences made by manufacturing engineers serves as a base for a manufacturability index so that different parameter settings in the CAD-models can be compared to find the best parameter settings, considering the trade-off with other performance criteria’s of the engine.

  • 1011.
    Stolt, Roland
    et al.
    Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design.
    André, Samuel
    Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design.
    Elgh, Fredrik
    Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design.
    Johansson, Joel
    Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design.
    Poorkiany, Morteza
    Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design.
    Managing Risk in the Introduction of New Technology in Products2015In: Journal of Aerospace Operations, ISSN 2211-002X, Vol. 3, no 3-4, p. 167-184Article in journal (Refereed)
    Abstract [en]

    In this paper interviews with staff involved in product development from four different companies is presented. The objective is to find out how the companies manage the technical risk of introducing new technology in products and how they prepare for meeting changing requirements from customers. The companies originates from aerospace, automotive and production engineering. Based on the results of the first study, a case study was carried out at the aerospace company. The studies shows that, the introduction of new technology varies with the risk of failure in the validation of the products. Companies that easily can revert back to the former technology is more risk taking. The types of products and the companies’ place in the supply chain has an impact on technology introduction and requirements handling. The companies have strategies for developing requirement specifications prior to the start of the project. This is most elaborate at the aerospace company where a thorough concept evaluation clarify possible variations in requirements.

  • 1012.
    Stolt, Roland
    et al.
    Jönköping University, School of Engineering, JTH, Product Development. Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design.
    Elgh, Fredrik
    Jönköping University, School of Engineering, JTH, Product Development. Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design.
    Andersson, Petter
    GKN Aerospace AB, Sweden.
    Design for Inspection: Evaluating the Inspectability of Aerospace Components in the Early Stages of Design2017In: Procedia Manufacturing, E-ISSN 2351-9789, Vol. 11, p. 1193-1199Article in journal (Refereed)
    Abstract [en]

    One important part of the manufacturing process of aerospace components is making inspections using Fluorescent Penetrant Inspection (FPI). This mandatory inspection represents a non-negligible part of the manufacturing and service cost. It is therefore important to make the geometry of the components suitable for inspection i.e. practicing Design for Inspection (DFI). This has been studied at an aerospace company with the aim of bringing DFI to the early stages of product development process. In this paper, a tool is proposed for the evaluation of inspectability in the early design stages. The tool is applied on CAD-models of the components automatically ranking the inspectability of design proposals using a novel inspectability index. Thus, inspectability can be considered together with other performance and manufacturing aspects forming a powerful decision support. The tool has been run and evaluated together with manufacturing staff at the aerospace company with promising results.

  • 1013.
    Stolt, Roland
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Product Development, Production and Design.
    Elgh, Fredrik
    Jönköping University, School of Engineering, JTH, Industrial Product Development, Production and Design.
    Heikkinen, Tim
    Jönköping University, School of Engineering, JTH, Industrial Product Development, Production and Design.
    Design and Evaluation of Aerospace Components for SLM2019In: Transdisciplinary engineering for complex socio-technical systems: Proceedings of the 26th ISTE International Conference on Transdisciplinary Engineering, July 30 – August 1, 2019 / [ed] K. Hiekata, B. Moser, M. Inoue, J. Stjepandić & N. Wognum, Amsterdam: IOS Press, 2019, p. 147-156Conference paper (Refereed)
    Abstract [en]

    Currently, the additive manufacturing process SLM (selective laser melting) is of high interest in the aerospace industry for the manufacture of jet engine components. This is driven by several factors such as reducing weight and minimizing the variation in the manufacturing process. In the paper, the state of practice in designing SLM parts is examined showing that there is plenty of opportunity to adapt designs to the process. However, this is often too time consuming in the early stages. By examining the state of art in SLM part design, the paper and identifies the variant specific cost drives that are proposed to be used to rank the manufacturability of different design alternatives for turbine frame aerospace components.

  • 1014.
    Stolt, Roland
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Product Development, Production and Design.
    Elgh, Fredrik
    Jönköping University, School of Engineering, JTH, Industrial Product Development, Production and Design.
    Jarfors, Anders E.W.
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    Challenges and Support when Introducing AM in HPDC Tooling2019In: Transdisciplinary engineering for complex socio-technical systems: Proceedings of the 26th ISTE International Conference on Transdisciplinary Engineering, July 30 – August 1, 2019 / [ed] K. Hiekata, B. Moser, M. Inoue, J. Stjepandić & N. Wognum, Amsterdam: IOS Press, 2019, p. 147-156Conference paper (Refereed)
    Abstract [en]

    When manufacturing tooling inserts for HPDC (High Pressure Die Casting), several manufacturing steps such as milling, heat treatment, electro discharge machining and finally surface treatment are involved. By instead manufacturing the insert by SLM (Selective laser melting), the process is expected to be quicker and with less material waste compared to the traditional manufacturing. Examples of other expected advantages is higher product variant flexibility and the possibility of making conform cooling channels, extending the die life. However, the insert is part of a die system involving many components. The insert cannot be designed and manufactured without considering the complete die system. This paper seeks how to integrate the insert design in the die assembly design. This is done via an example component and in cooperation with die manufacturing firms. The result is that the printing is a minor step of the total manufacturing process and that special design considerations needs to be taken for an SLM insert. New die concepts are needed that will minimise the amount of material, reduce the tolerance and surface demand and support the subdivision of the die into several printed parts.

  • 1015.
    Stolt, Roland
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Product Development, Production and Design.
    Heikkinen, Tim
    Jönköping University, School of Engineering, JTH, Industrial Product Development, Production and Design.
    Elgh, Fredrik
    Jönköping University, School of Engineering, JTH, Industrial Product Development, Production and Design.
    Integrating Additive Manufacturing in the Design of Aerospace Components2018In: Transdisciplinary Engineering Methods for Social Innovation of Industry 4.0: Proceedings of the 25th ISPE Inc. International Conference on Transdisciplinary Engineering / [ed] Margherita Peruzzini, Marcello Pellicciari, Cees Bil, Josip Stjepandić, Nel Wognum, IOS Press, 2018, p. 145-154Conference paper (Refereed)
    Abstract [en]

    In the aerospace industry, Additive Manufacturing (AM) is quickly gaining ground. When optimizing the design of an AM component, all life-cycle aspects need to be considered. It is by no means limited to the classic weight / stiffness optimization of the topology alone. The AM component design must comply with an array of requirements on for example assembly, maintenance and inspection. In addition, there are the manufacturability requirements and constraints of the printing procedure itself, including component orientation and support structures. In this paper, a proposal on how to integrate the AM design of components with the design of the complete engine structure is presented. To find how the current design process is conducted, an interview study involving design and manufacturing experts has been made at an aerospace company, forming a base for the proposal. The result is that a primary design procedure for the AM component must be made as a separate step involving a limited set of design considerations prior to making a multidisciplinary evaluation of the proposed engine structure.

  • 1016.
    Stolt, Roland
    et al.
    Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design. Jönköping University, School of Engineering, JTH, Product Development.
    Johansson, Joel
    Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design. Jönköping University, School of Engineering, JTH, Product Development.
    André, Samuel
    Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design. Jönköping University, School of Engineering, JTH, Product Development.
    Heikkinen, Tim
    Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design. Jönköping University, School of Engineering, JTH, Product Development.
    Elgh, Fredrik
    Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design. Jönköping University, School of Engineering, JTH, Product Development.
    How to Challenge Fluctuating Requirements: Results from Three Companies2016In: Transdisciplinary Engineering: Crossing Boundaries / [ed] Milton Borsato, Nel Wognum, Margherita Peruzzini, Josip Stjepandić and Wim J.C. Verhagen, IOS Press, 2016, p. 1061-1070Conference paper (Refereed)
    Abstract [en]

    This paper presents the results from a research project conducted by the research group Computer Supported Engineering Design (CSED) in Jonkoping University in Sweden. The project has the aim of increasing companies’ ability to respond to fluctuating requirements when developing new products and product variants. The companies participating in the project represents automotive, aerospace and production equipment industries. Three different cases of applications have been developed and implemented in the companies. Product models ranging from product to knowledge centered for use in the company’s product and technology platforms have been demonstrated and evaluated though interviews with professionals at the companies. To summarize, the results shows that the companies’ abilities to respond to fluctuating requirements have increased albeit concerns have been raised on the maintenance of knowledge in the implementations.

  • 1017.
    Stolt, Roland
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Computer Supported Engineering Design. Produktutveckling.
    Sunnersjö, Staffan
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Computer Supported Engineering Design.
    Automatic preparation of CAD-generated solid geometry for FE-meshing2005In: NAFEMS World Congress 2005, 2005, p. 101-Conference paper (Refereed)
    Abstract [en]

    In recent years the computing power and meshing algorithms have developed to a state where FEA problems can often be solved directly using the solid geometry. However for complex geometry and complicated calculations there will for the foreseeable future be a need for geometrical idealizations.

    To reduce the time spent on making geometrical idealizations in repetitive FEA, a CAD-integrated KBES (Knowledge Based Engineering System) has been developed. The KBES creates a surface idealization from a thin-walled solid by utilizing generic modelling knowledge and by registering information about the CAD-specific features which the designer uses to define the solid geometry. From this information a corresponding surface idealization is created in the same CAD-system. This allows an updated and parametric geometry idealization of the complete CAD-geometry to be created with a degree of automation directly in the CAD-system.

    Primarily the mid-surfaces oriented in the tooling draft direction are created by evaluating the sketches which the features of the CAD-model are based on. The KBES also trims the created surfaces, thus facilitating the subsequent meshing.

    The KBES has been developed in CATIA V5 (Dassault systemes). It contains rules defined in CATIA knowledgeware which trigger sequential routines written in VBA (Visual Basic for Applications). An industrial application example where the system is used to automatically create a surface idealization for a die-cast part is also presented.

  • 1018.
    Strand, Martina
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    RFID - tillämpning och lönsamhet2008Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report is the result of an investigation of the possibility to use RFID-technology in a producing company. The investigation is focused on a flow between the company’s producing subsidiary company in Lithuania and its main facility in Sweden.

    RFID is the abbreviation for radiofrequency identification. The RFID-technology forms the base of a system with wireless information transmission between an object to which a transponder, also called tag, has been attached and a reader. The information is transmitted by radio waves and the system is equipped with software that can digitalise the radio waves. The information is thereby converted into useful input to, for example, the company’s business system. RFID makes it possible to decrease the human interaction necessary and does not demand free line of sight in contrast to barcode systems.

    The objective of this final thesis is to:

    ·         give suggestions of how RFID can be applied in the flow of pallets between the Lithuanian subsidiary company and the main facility in Sweden

    ·         investigate if the adoption is practicable and what consequences will follow the suggested appliance

    ·         present profitability calculations

    ·         investigate what future opportunities the technology offers the company

    The scope of my work is to be able to present a report to the company that gives them a good insight in the RFID-technology and to give suggestions on how to use it in their operations. The report shall be useable as a decision basis for the company when deciding weather it is interesting for them to continue the investigation or not.

    The result of the investigation is a description of the flow which forms the basis of the two suggested alternatives of application of RFID-technology. The first alternative consists of a system of active tags which is attached to the pallets directly after the goods are produced. The second alternative is a system based on the use of passive tags in the form of self adhesive labels. Both alternatives induce a division of the flow into five zones between which a reading of the tags takes place and the pallets are thereby identified automatically.

    The system of active tags results in an initial investment of SEK 1 256 000 and the system of passive tags, SEK 227 000. Both alternatives make a SEK 648 000 saving in cost possible, mainly consisting of decreasing need of working effort in identifying pallets and manual reporting to the business system.

     

     

    An analysis of the suggestions shows that the pay-back time for the alternative with active tags may be too long depending on the company’s intentions of future expansion of the system. The investment can be proven justifiable after a more thorough investigation. Concerning the system of passive tags, the analysis shows that the alternative is practicable and gives a great chance of fast profitability and also further profitability over time.

    The investigation is based on a theoretic study of RFID, Supply Chain Management and process analysis. A survey of the process has resulted in a flow chart and this has formed the basis of the work resulting in the two suggested applications. These have then been evaluated from a profitability and practicability perspective.

     

  • 1019.
    Strandberg, Marcus
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Determination and implementation of polymer parameters into simulations of the twin-screw extrusion process.2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis was conducted in cooperation with a Swedish company that develops and manufactures plastic compounds. An increasing need for identifying material properties is seen within the industry in order to predict the outcome of the extrusion process by using simulations. The purpose of this study was to expand a material database with the results obtained through various measurements of the material parameters in order to enable simulations. The numerical descriptions would be analyzed and validated in relation to the obtained results and conducted methods to enable implementation of the material data into the industry. In order to fulfill the purpose, scientific methods was applied by chosen literature studies, research approaches and experimental research. Machine tests were conducted to collect relevant output data that was compared with the results obtained during the simulation process where the experimentally determined material parameters were applied in a material database. Typical injection molding qualities of PET, POM, PC/ABS, SAN and PA66 has been investigated by conducting measurement methods described by standards of the melt flow rate, specific heats, viscosity, crystallinity and melt- and glass transition temperatures. With exception of the viscosity, the material parameters are considered to have high external validity and high reliability and can be implemented into the industry. The bulk- and melt density was determined by adapted methods that need further investigations. The external validity is reduced until these methods and measurements have been validated. The determined material parameters proved to be able to generate reliable simulation results that indicate of how the extrusion process will turn out based on the output values investigated. The data obtained through machine tests was compared with the results that were achieved through simulations and deviated at most 10.9% from the actual outcomes. The viscosity is considered to be the main factor that affects the differences of the output data between the machine tests and the simulation results. 

  • 1020.
    Ström, Mikael Karl
    et al.
    Swerea IVF AB.
    Raudberget, Dag
    Jönköping University, School of Engineering, JTH, Product Development. Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design.
    Gustafsson, G.
    Development of a methodology to implement set-based design in a day2016In: Proceedings of the DESIGN 2016 14th International Design Conference, Dubrovnik, May 16-19, 2016 / [ed] D. Marjanović, M. Štorga, N. Pavković, N. Bojčetić & S. Škec, The Design Society, 2016, p. 523-532Conference paper (Refereed)
    Abstract [en]

    A simplified variant of Set-Based Design (SBD) was created and combined with creative methods such as the 6-3-5 method and the gallery method. This made it easy to introduce in one day, which has been verified by tests in industrial firms. In total 45 experienced designers have tested the method on real mechanical design problems. The method was perceived easy to understand and was well received by the designers. The introduction of it was less cumbersome compared to the full version of SBD. The conclusion is that the developed method makes it easier to introduce parts of SBD with good results.

  • 1021.
    Ström, Mikael
    et al.
    Swerea IVF.
    Raudberget, Dag
    Jönköping University, School of Engineering, JTH, Product Development. Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design. Chalmers tekniska högskola.
    Gustafsson, Göran
    Chalmers tekniska högskola.
    Instant Set-Based Design, an Easy Path to Set-Based Design2016In: Procedia CIRP / [ed] Lihui Wang, Elsevier, 2016, Vol. 50, p. 234-239Conference paper (Refereed)
    Abstract [en]

    A simplified variant of Set-Based Design (SBD) was created. It was combined with the creative methods 6-3-5 and the Gallery method as well as the systematic method morphological matrix to generate solutions. This made it possible to introduce SBD in one day, which has been verified by tests on design problems at industrial firms. The methodology, Instant Set-Based Design (ISBD), was perceived easy to understand and was well received by the designers. The introduction of it was less cumbersome compared to the full version of SBD. The conclusion is that the developed methodology works as intended with good results.

  • 1022.
    Strömberg, Adrian
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Larsson, Adam
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Projektmodeller för kundanpassad produktutveckling: Nulägesanalys med förbättringsalternativ2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis is based on a case study at ITAB ScanFlow AB (ISF), which is part of the ITAB Group. It is a company that works daily in projects that develop cash flow system solutions. A project can either be based on innovative ideas or on the wishes of customers. This thesis focuses on projects that have a high degree of customization. A common problem in the company is that projects expand in scope, meaning that the time plan is exceeded, and unnecessary costs connected to poor quality arise.

    To work effectively on a daily basis requires that a project model exists and is followed. We found that ISF does not work according to any project model. By working according to a project model, there are greater chances to continuously be achieving good results from each project. Project may have different characteristics depending on the type of project model chosen. Project models can be divided into four main areas Serial, Parallel, Agile and Dynamic.

    The data collection of the study has been conducted through interviews and literature studies to describe the company's current situation. It has given a clear picture of how their way of working in projects with a high degree of customer customization looks. Analysis of the current way of working description has then been analyzed to identify opportunities for improvement, and which solutions can solve the identified improvement opportunities.

    The result of the report shows a proposal that ISF could implement and apply in their operations. Implementation of our proposed solution would create a clear structure as well as eliminate any unnecessary cost incurred by quality deficiencies. The proposal is primarily created to be applied in projects that have a high degree of customization but could also be modified to work in other types of projects in ISF’s operations.

  • 1023.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    A method for structural dynamic contact problems with friction and wear2003In: International Journal for Numerical Methods in Engineering, ISSN 0029-5981, E-ISSN 1097-0207, Vol. 58, no 15, p. 2371-2385Article in journal (Refereed)
  • 1024.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    A Newton algorithm for fretting problems1996In: Euromech Colloquium 351, Systems with Coulomb friction, Vadstena, Sweden, August 5-7, 1996, 1996Conference paper (Other academic)
  • 1025.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    A Newton algorithm for wear problems1997In: 3rd EUROMECH Solid Mechanics Conference, Stockholm, Sweden, August 18-22, 1997, 1997Conference paper (Other academic)
  • 1026.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    A Newton method for three-dimensional fretting problems1999In: International Journal of Solids and Structures, ISSN 0020-7683, E-ISSN 1879-2146, Vol. 36, no 14, p. 2075-2090Article in journal (Refereed)
  • 1027.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    An augmented Lagrangian method for fretting problems1996In: Euromech Colloquium 346, March 20-22, Oxford, 1996., 1996Conference paper (Other academic)
  • 1028.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    An augmented Lagrangian method for fretting problems1997In: European journal of mechanics. A, Solids, ISSN 0997-7538, E-ISSN 1873-7285, Vol. 16, no 4, p. 573-593Article in journal (Refereed)
  • 1029.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization.
    An Eulerian approach for simulating frictional heat bands in rotating discs2012Conference paper (Other academic)
  • 1030.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization.
    An Eulerian Approach for Simulating Frictional Heating in Disc-Pad Systems2011In: European journal of mechanics. A, Solids, ISSN 0997-7538, E-ISSN 1873-7285, Vol. 30, no 5, p. 673-683Article in journal (Refereed)
    Abstract [en]

    Thermal stresses as a result from frictional heating must be considered when designing disc brakes, clutches or other rotating machine components with sliding contact conditions. The rotational symmetry of the disc in these kind of applications makes it possible to model these systems using an Eulerian approach instead of a Lagrangian framework. In this paper such an approach is developed and implemented. The disc is formulated in an Eulerian frame where the convective terms are defined by the angular velocity. By utilizing the Eulerian framework, a node-to-node formulation of the contact interface is obtained, producing most accurate frictional heat power solutions. The energy balance of the interface is postulated by introducing an interfacial temperature. Both frictional power and contact conductances are included in this energy balance. The contact problem is solved by a non-smooth Newton method. By adopting the augmented Lagrangian approach, this is done by rewriting Signorini’s contact conditions to an equivalent semi-smooth equation. The heat transfer in the disc is discretized by a Petrov–Galerkin approach, i.e. the numerical difficulties due to the non-symmetric convective matrix appearing in a pure Galerkin discretization is treated by following the streamline-upwind approach. In such manner a stabilization is obtained by adding artificial conduction along the streamlines. For each time step the thermo-elastic contact problem is first solved for the temperature field from the previous time step. Then, the heat transfer problem is solved for the corresponding frictional power. In such manner a temperature history is obtained sequentially via the trapezoidal rule. In particular the parameter is set such that both the Crank–Nicolson and the Galerkin methods are utilized. The method seems very promising. This is demonstrated by solving a two-dimensional benchmark as well as a real disc brake system in three dimensions.

  • 1031.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    An Implicit Method for Frictional Contact, Impact and Rolling2005In: European journal of mechanics. A, Solids, ISSN 0997-7538, E-ISSN 1873-7285, Vol. 24, no 6, p. 1016-1029Article in journal (Refereed)
    Abstract [en]

    In this paper an implicit method for frictional contact, impact and rolling is suggested. A nonclassical formulation of a two-dimensional hyperelastic body unilaterally constrained to rigid supports is proposed by following the ideas of Moreau and Jean. A total Lagrangian formulation of the system is given. The elastic properties are defined by coupling the second Piola–Kirchhoff stress to the Green–Lagrange strain via the Kirchhoff–St. Venant law. The equation of motion is written in the spirit of Moreau by using the mean value impulses introduced by Jean. The mean value impulses appear explicitly in the equation of motion. In such manner the treatment of nonconstant kinematic transformation matrices becomes straightforward. The rigid supports are described by smooth functions. By utilizing these functions and the mean value impulses, new contact/impact laws of Signorini and Coulomb type are formulated. The governing equations are solved by a nonsmooth Newton method. This is performed by following the augmented Lagrangian approach and deriving the consistent stiffness matrix as well as the contact stiffness matrices. Three two-dimensional examples are solved by the method: a contact problem, an impact problem and a rolling contact problem.

  • 1032.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    Augmented Lagrangian methods for wear problems1995In: NSCM VIII: eighth Nordic seminar on computational mechanics : Göteborg November 17-18, 1995 : short papers, Göteborg: Department of Structural Mechanics, Chalmers University of Technology , 1995Conference paper (Other academic)
  • 1033.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    Conceptual design of a hub by using topology optimization and residual stress simulations2007In: handouts in the proceedings of the 1st European HTC, 23-24 October, Berlin, 2007, 2007Conference paper (Other (popular science, discussion, etc.))
  • 1034.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    Contact, impact and rolling of a nonlinear elastic body on rigid foundations2005In: Proceedings of Multibody Dynamics, International Conference on Advances in Computational Multibody Dynamics: June 21-24, Madrid, Spain, 2005, 2005Conference paper (Refereed)
  • 1035.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization.
    Development and Implementation of an Eulerian Approach for Efficient Simulation of Frictional Heating in Sliding Contacts2011In: Coupled problems 2011 : computational methods for coupled problems in science and engineering IV: proceedings of the IV International Conference on Computational Methods for Coupled Problems in Science and Engineering held in Kos, Greece, 20 - 22 June 2011, 2011Conference paper (Refereed)
  • 1036.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    En implicit metod för kontakt och stötproblem med stora rotationer2007In: Luleå tekniska universitet, Svenska Mekanikdagar, 13-15 juni, 2007, 2007Conference paper (Other academic)
  • 1037.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    Finite element treatment of thermoelastic wear problems1998In: Proceedings of the IUTAM-Symposium on Unilateral Multibody Dynamics, 1998Conference paper (Refereed)
  • 1038.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    Finite element treatment of tribological problems1998In: Proceedings of the International Symposium on Impact and Friction of Solids, Structures and Machines, June 27-30, Ottawa, Canada, 1998, 1998Conference paper (Refereed)
  • 1039.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    Finite element treatment of two-dimensional thermoelastic wear problems1999In: Computer Methods in Applied Mechanics and Engineering, ISSN 0045-7825, E-ISSN 1879-2138, Vol. 177, no 3-4, p. 441-455Article in journal (Refereed)
  • 1040.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    Frictional Contact/Impact between a Hyperelastic Body and Moving Rigid Obstacles2006In: Proceedings of the 3rd European Conference on Computational Mechanics: June 5-9, Lisbon, Portugal, 2006., 2006Conference paper (Refereed)
  • 1041.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization.
    RBDO with Non-Gaussian Variables by using a LHS- and SORM-based SLP approach and Optimal Regression Models2012Conference paper (Other academic)
    Abstract [en]

    A general sequential linear programming (SLP) approach for reliability based design optimization (RBDO) with non-Gaussian random variables is presented. The RBDO problems are formulated by using optimal regression models (ORM) as surrogate models and S-optimal design of experiments (DoE). The S-optimal DoE is obtained by maximizing the average mean of the distances between the nearest neighbors. Finite element simulations are performed for the S-optimal DoE and corresponding ORM are obtained by a genetic algorithm. In such manner not only optimal regression coefficients are generated but also optimal rational base functions. The RBDO problems are solved by introducing intermediate variables defined by the iso-probabilistic transformation at the most probable point. By using these variables in the Taylor expansions, a corresponding deterministic linear programming problem is derived, which is corrected by applying second order reliability methods (SORM) as well as Monte Carlo simulations. For low target values on the reliability crude Monte Carlo simulations are used, but for high targets a Latin hypercube sampling (LHS) approach is utilized. The implementation of the suggested sampling- and SORM-based SLP approach is efficient and robust. This is demonstrated by presenting trade-off curves between the objective function, constraints, variables and the target of reliability.

  • 1042.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    Simulation of Rotary Draw Bending using Abaqus and a Neural Network2005In: Proceedings of Nafems Nordic Conference on Component and System Analysis using Numerical Simulation Techniques - FEA, CFD, MBS: November 24-25, Gothenburg, 2005., 2005Conference paper (Refereed)
  • 1043.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization.
    Simulering av bromsvärme i en skivbroms med en Eulerformulering, Svenska Mekanikdagar2011Conference paper (Other academic)
  • 1044.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    The Influence of Sliding Friction on Optimal Topologies2009In: Proceedings of the 5th Contact Mechanics International Symposium, April 28-30, Chania, Greece, 2009, 2009Conference paper (Refereed)
  • 1045.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization.
    Topology Optimization of Bodies in Unilateral Contact by Maximizing the Potential Energy2012In: Proceedings the Eleventh International Conferenceon Computational Structures Technology / [ed] B.H.V. Topping, Civil-Comp Press , 2012, p. Paper 237-Conference paper (Refereed)
    Abstract [en]

    The modelling of the boundary conditions is crucial in topology optimisation. Small changes in these conditions will typically imply new optimal layouts of material. In many situations the design domain is connected to an assembly of components using contact interfaces. In order to generate proper layouts for this type of design domain one must treat these contact interfaces accurately in the topology optimisation procedure.

    The bottle-neck in topology optimisation of non-linear structural problems, such as contact problems, is to solve the state equations and the adjoint equations. By choosing the potential energy as the objective the latter equations are not needed in the sensitivity analysis. In this paper topology optimization of contact problems including non-zero prescribed displacements by maximizing the potential energy is performed. For contact problems with zero initial contact gaps and zero prescribed displacements this is equivalent to minimising the compliance, which is the standard approach in topology optimisation. However, when the compliance is used as objective in topology optimisation of contact problems an extra adjoint equation must be solved. This is not needed in the formulation presented in this paper.

    The efficiency of the approach is demonstrated by studying three different problems, two problems in two-dimensions and one in a three-dimensional setting. The method is implemented by using Matlab and Intel Fortran, where the Fortran code is linked to Matlab as mex-files. The implementation can be downloaded as a toolbox (Topo4abq). The three problems have beensolved using this toolbox on a laptop with an Intel Core i7 2.67 GHz processor and a 64 bit version of Windows. It is shown that the CPU-time is reduced as much as 25% compared to an adjoint approach developed in previous works.

  • 1046.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization.
    Topology Optimization of Hyperelastic Bodies by Maximizing the Equilibrium Potential Energy2012Conference paper (Other academic)
  • 1047.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    Topology optimization of linear elastic structures with contact boundaries2008In: 5th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2008), 2008Conference paper (Other academic)
  • 1048.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    TriLab - a tool for simulating tribological systems2003In: Proceedings of the 9th International Power Transmission and Gearing Conference: presented at the 2003 ASME Design Engineering Technical Conferences and Computers and Information in Engineering Conference : September 2-6, 2003, Chicago, Illinois, New York: American Society of Mechanical Engineers , 2003Conference paper (Refereed)
  • 1049.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    TriLab: a toolbox for tribological systems2003In: Proceedings of the Nordic MATLAB conference,October 21-22, Copenhagen, Denmark, 2003, 2003Conference paper (Refereed)
  • 1050.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    What is the Optimal Shape of a Snap Ring?2007In: Proceedings of the 6th International Conference on Multibody Systems, Nonlinear Dynamics, and Control: 2007 ASME International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, September 4-7, Las Vegas, Nevada, USA, New York: American Society of Mechanical Engineers , 2007Conference paper (Refereed)
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