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Microstructural strain distribution in ductile iron; Comparison between finite element simulation and digital image correlation measurements
Högskolan i Jönköping, Tekniska Högskolan, JTH, Material och tillverkning. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Material och tillverkning – Gjutning.ORCID-id: 0000-0002-5635-8023
Högskolan i Jönköping, Tekniska Högskolan, JTH, Material och tillverkning. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Material och tillverkning – Gjutning.
Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Simulering och optimering.
Högskolan i Jönköping, Tekniska Högskolan, JTH, Material och tillverkning. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Material och tillverkning – Gjutning.ORCID-id: 0000-0002-0101-0062
2015 (engelsk)Rapport (Annet vitenskapelig)
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.

sted, utgiver, år, opplag, sider
Jönköping: Jönköping University, School of Engineering , 2015. , s. 17
Serie
JTH research report, ISSN 1404-0018
HSV kategori
Identifikatorer
URN: urn:nbn:se:hj:diva-27858OAI: oai:DiVA.org:hj-27858DiVA, id: diva2:851433
Tilgjengelig fra: 2015-09-04 Laget: 2015-09-04 Sist oppdatert: 2018-08-21bibliografisk kontrollert

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