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Microstructural strain distribution in ductile iron; Comparison between finite element simulation and digital image correlation measurements
Jönköping University, School of Engineering, JTH, Materials and Manufacturing. Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.ORCID iD: 0000-0002-5635-8023
Jönköping University, School of Engineering, JTH, Materials and Manufacturing. Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
Jönköping University, School of Engineering, JTH, Product Development. Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization.
Jönköping University, School of Engineering, JTH, Materials and Manufacturing. Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.ORCID iD: 0000-0002-0101-0062
2015 (English)Report (Other academic)
Abstract [en]

This paper presents a study on micro-scale deformation and the effect of microstructure on localised deformation of ductile iron, utilizing in-situ tension testing, digital image correlation (DIC) and finite element analysis (FEA). A tensile stage integrated with an optical microscope was used to acquire a series of micrographs during the tensile test. Applying DIC and an etched speckle pattern, a high resolution local strain field was measured in the microstructure. In addition, a finite element (FE) model was used to predict the strain maps. The materials parameters were optimized based on Ramberg-Osgood model. The DIC and simulation strain maps conformed to a large extent resulting in the verification of the model in micro-scale level. It was found that the Ramberg-Osgood theory can be used to capture the main trends of strain localization. The discrepancies between the simulated and DIC results were explained based on microstructure dimensionality, differences in spatial resolution and uncertainty in the FE-model.

Place, publisher, year, edition, pages
2015. , p. 17
Series
JTH research report, ISSN 1404-0018
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:hj:diva-27858OAI: oai:DiVA.org:hj-27858DiVA, id: diva2:851433
Available from: 2015-09-04 Created: 2015-09-04 Last updated: 2017-04-21Bibliographically approved

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Kasvayee, Keivan AmiriGhassemali, EhsanSalomonsson, KentJarfors, Anders E. W.

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Kasvayee, Keivan AmiriGhassemali, EhsanSalomonsson, KentJarfors, Anders E. W.
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JTH, Materials and ManufacturingJTH. Research area Materials and manufacturing – CastingJTH, Product DevelopmentJTH. Research area Product Development - Simulation and Optimization
Metallurgy and Metallic Materials

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CiteExportLink to record
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  • harvard1
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