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Spatially resolved observations of strain fields at necking and fracture of anisotropic hardened steel sheet material
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.
2009 (English)In: International Journal of Solids and Structures, ISSN 0020-7683, E-ISSN 1879-2146, Vol. 46, no 13, p. 2750-2756Article in journal (Refereed) Published
Abstract [en]

In this work plastic strain localization, also referred to as necking, of press-hardened ultra-high strength steel is observed using digital speckle correlation. The region of the neck is studied during tensile tests of specimens specially designed to facilitate strain localization at an inner point of the material, thus avoiding edge effects on localization and fracture. By using measurements with a length scale small enough to properly resolve the neck, its growth and shape can be studied. Furthermore, the anisotropy of the material is investigated by examining specimens cut out at different angles to the rolling direction. It is seen that the local fracture strain of specimens cut out along the rolling direction is approximately twice as high as it is for specimens cut out perpendicular to the rolling direction.

Place, publisher, year, edition, pages
2009. Vol. 46, no 13, p. 2750-2756
National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-14879DOI: 10.1016/j.ijsolstr.2009.03.003ISI: 000266045700022Scopus ID: 2-s2.0-65349159277Local ID: e4ec9980-300e-11de-bd0f-000ea68e967bOAI: oai:DiVA.org:ltu-14879DiVA, id: diva2:987852
Note
Validerad; 2009; 20090423 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Eman, JesperSundin, Karl-GustafOldenburg, Mats

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