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Spatially resolved observations of strain fields at necking and fracture of anisotropic hardened steel sheet material
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Material- och solidmekanik.
2009 (engelsk)Inngår i: International Journal of Solids and Structures, ISSN 0020-7683, E-ISSN 1879-2146, Vol. 46, nr 13, s. 2750-2756Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
2009. Vol. 46, nr 13, s. 2750-2756
HSV kategori
Forskningsprogram
Hållfasthetslära
Identifikatorer
URN: urn:nbn:se:ltu:diva-14879DOI: 10.1016/j.ijsolstr.2009.03.003ISI: 000266045700022Scopus ID: 2-s2.0-65349159277Lokal ID: e4ec9980-300e-11de-bd0f-000ea68e967bOAI: oai:DiVA.org:ltu-14879DiVA, id: diva2:987852
Merknad
Validerad; 2009; 20090423 (ysko)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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Eman, JesperSundin, Karl-GustafOldenburg, Mats

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