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Cannmo, Patrik
Publications (7 of 7) Show all publications
Raudberget, D. & Cannmo, P. (2008). Learning product development through a design-build-test project: Why is coaching important?. In: Proceedings of the 4th International CDIO Conference, Gent, Belgium.
Open this publication in new window or tab >>Learning product development through a design-build-test project: Why is coaching important?
2008 (English)In: Proceedings of the 4th International CDIO Conference, Gent, Belgium, 2008Conference paper, Published paper (Other academic)
Abstract [en]

For the last seven years a successful cooperation between courses in product design and industrial design has been running at the School of Engineering at Jönköping University (JTH), Sweden. The concept of fusing separate courses with different domains of knowledge into one project is of course well known by most teachers, but this course takes this form of education one step further. This paper will describe the experience of coaching over 90 design-build-test projects going through the steps design, build, test but also the steps of fail and learn.

Identifiers
urn:nbn:se:hj:diva-12400 (URN)
Available from: 2010-06-04 Created: 2010-06-04 Last updated: 2010-06-09Bibliographically approved
Cannmo, P., Seifeddine, S., Svensson, L. & Svensson, I. L. (2006). Stress-Strain Modelling Influenced by Porosities in Cast Aluminium Alloys.
Open this publication in new window or tab >>Stress-Strain Modelling Influenced by Porosities in Cast Aluminium Alloys
2006 (English)Conference paper, Published paper (Refereed)
National Category
Materials Engineering
Identifiers
urn:nbn:se:hj:diva-4377 (URN)
Available from: 2007-11-05 Created: 2007-11-05 Last updated: 2017-08-14Bibliographically approved
Cannmo, P. & Snygg, H. (2001). FE-modeling of dynamic experimental testing with large elastic-plastic deformations. In: Proceedings of IMAC-XIX: a conference on structural dynamics : February 5-8, 2001, Hyatt Orlando, Kissimmee, Florida (pp. 531-537). Bethel, Conn.: Society for Experimental Mechanics
Open this publication in new window or tab >>FE-modeling of dynamic experimental testing with large elastic-plastic deformations
2001 (English)In: Proceedings of IMAC-XIX: a conference on structural dynamics : February 5-8, 2001, Hyatt Orlando, Kissimmee, Florida, Bethel, Conn.: Society for Experimental Mechanics , 2001, p. 531-537Conference paper, Published paper (Refereed)
Abstract [en]

Several types of dynamic tests are carried out at SP Swedish National Testing and Research Institute. The tests considered in this paper, which are all simulated with FE-calculations, are as follows: a drop test of cask filled with water, a tennis racket/ball test, a test of a full face protector for hockey players and an impact test of a simplified bumper. To obtain a high-quality verification of the FE-results high-speed video recording of the test sequence is done in all four cases. Parameter studies are done regarding velocity and drop height. The FE-models are built up in the commercial software ABAQUS and I-deas, and are all solved numerically with ABAQUS/Explicit. The material models used in the FE-calculations include linear elastic, elastic-plastic with non-linear hardening, hyperelastic and linear hydrodynamic behavior. Different types of tests are carried out on material specimens in order to determine the material parameters used in the FE-models.

Place, publisher, year, edition, pages
Bethel, Conn.: Society for Experimental Mechanics, 2001
Series
Proceedings of the International Modal Analysis Conference, ISSN 1046-6770 ; 19
Identifiers
urn:nbn:se:hj:diva-5037 (URN)0-912053-72-0 (ISBN)
Available from: 2008-01-03 Created: 2008-01-03 Last updated: 2009-10-12Bibliographically approved
Cannmo, P. (1998). An interface model based on damage coupled to slip and dilatation. In: Fracture from defects: Proceedings of the 12th Bienniel Conference on Fracture - ECF, held in Sheffield, U.K., 14-18 September 1998 (pp. 957-962). West Midlands, U.K.: Engineering Materials Advisory Services
Open this publication in new window or tab >>An interface model based on damage coupled to slip and dilatation
1998 (English)In: Fracture from defects: Proceedings of the 12th Bienniel Conference on Fracture - ECF, held in Sheffield, U.K., 14-18 September 1998, West Midlands, U.K.: Engineering Materials Advisory Services , 1998, p. 957-962Conference paper, Published paper (Refereed)
Abstract [en]

The mesomechanics behavior of a polycrystalline microstructure subjected to creep and constant strain rate loadings is investigated. The analysis is based on a Voronoi polygonization strategy for the generation of grains, that are bonded to each other via interfaces along the grain boundaries. A new constitutive model is proposed for the rate-dependent debonding along these interfaces, whereby damage is kinetically coupled to viscoplastic slip and dilatation. The paper may be viewed as generalizing the rate-independent model used in Cannmo et al. (1995).

Place, publisher, year, edition, pages
West Midlands, U.K.: Engineering Materials Advisory Services, 1998
National Category
Materials Engineering Mechanical Engineering
Identifiers
urn:nbn:se:hj:diva-5041 (URN)190153703X (ISBN)
Available from: 2008-05-19 Created: 2008-05-19 Last updated: 2009-10-12Bibliographically approved
Cannmo, P. (1997). Damage-based interface model: application to the degradation and failure of a polycrystalline microstructure. (Doctoral dissertation). : Doktorsavhandlingar vid Chalmers Tekniska Hogskola (1310), pp. 1-160
Open this publication in new window or tab >>Damage-based interface model: application to the degradation and failure of a polycrystalline microstructure
1997 (English)Doctoral thesis, monograph (Other scientific)
Abstract [en]

A constitutive model is introduced for material interfaces. The model is based on damage coupled to plastic slip and dilatation, and can describe the successive degradation and failure of an interface. The main application of the interface model is in the context of a mesomechanics analysis of a polycrystalline microstructure which may consist of two phases. FE-calculations are carried out for a unit cell of microstructure. A sensitivity analysis is carried out for possible variation of the interfacial parameters. Localization and shear bands are detected in the analytically predicted range.

Place, publisher, year, edition, pages
Doktorsavhandlingar vid Chalmers Tekniska Hogskola (1310), pp. 1-160, 1997. p. 160
Identifiers
urn:nbn:se:hj:diva-5039 (URN)
Available from: 2008-01-03 Created: 2008-01-03
Cannmo, P., Mähler, L. & Runesson, K. (1997). Modelling of interfacial viscoplastic slip coupled to damage in a polycrystalline microstructure. Computational Mechanics, 20(1-2), 12-19
Open this publication in new window or tab >>Modelling of interfacial viscoplastic slip coupled to damage in a polycrystalline microstructure
1997 (English)In: Computational Mechanics, ISSN 0178-7675, E-ISSN 1432-0924, Vol. 20, no 1-2, p. 12-19Article in journal (Refereed) Published
Abstract [en]

The mesomechanics behavior of a polycrystalline microstructure subjected to creep and constant strain rate loadings is investigated. The analysis is based on a Voronoi polygonization strategy for the generation of grains, that are bonded to each other via interfaces along the grain boundaries. A new constitutive model is proposed for the rate-dependent debonding along these interfaces, whereby damage is kinetically coupled to viscoplastic slip and dilatation. The paper may be viewed as generalizing the rate-independent model used in Cannmo et al. (1995).

Identifiers
urn:nbn:se:hj:diva-5038 (URN)
Available from: 2008-01-03 Created: 2008-01-03 Last updated: 2017-12-12Bibliographically approved
Cannmo, P., Runesson, K. & Ristinmaa, M. (1995). Modelling of plasticity and damage in a polycrystalline microstructure. International journal of plasticity, 11(8), 949-970
Open this publication in new window or tab >>Modelling of plasticity and damage in a polycrystalline microstructure
1995 (English)In: International journal of plasticity, ISSN 0749-6419, E-ISSN 1879-2154, Vol. 11, no 8, p. 949-970Article in journal (Refereed) Published
Abstract [en]

The mesomechanical behavior of a polycrystalline microstructure subjected to monotonic and cyclic loadings is investigated. The analysis is based on a Voronoi polygonization strategy for generation of grains embedded in a contiguous matrix. The main emphasis is to investigate the interaction between the microconstituents and the failure processes along grain boundaries. A rational interface theory based on damage development coupled to inelastic slip and dilatation is developed. The theory uses the interface width as a constitutive parameter, which regularizes the theory of LEMAITRE [1992], that is restricted to perfect bond between grain and matrix. In a series of FE-analyses parameter variations were performed. The unit cell size (as compared to the average grain diameter), the grain-matrix area ratio, the interface width and constitutive parameters. It appears that the composite behavior can be designed as brittle or ductile solely depending on the strength and rate of damage development in the interfaces. A localization band was detected, and its orientation is in the range that is predicted within continuum theory

Identifiers
urn:nbn:se:hj:diva-5040 (URN)
Available from: 2008-01-03 Created: 2008-01-03 Last updated: 2017-12-12Bibliographically approved
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