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Hot Stamping of Tailored Component: Experiments and Numerical Analysis
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Material- och solidmekanik.ORCID-id: 0000-0002-4634-4373
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Material- och solidmekanik.ORCID-id: 0000-0001-7074-8960
2015 (engelsk)Inngår i: Hot Sheet Metal Forming of High-Performance Steel 5th International Conference: May 31-June 3, Toronto, Canada : Proceedings / [ed] Kurt Steinhoff; Mats Oldenburg; Braham Prakash, Auerbach: Verlag Wissenschaftliche Scripten , 2015, s. 755-763Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

This study is concerned with plasticity and ductile fracture modelling aspects of press hardened steels, where multiple phases of different yield strength, work hardening and ductility are present. Macroscopic constitutive properties are determined using a semi-analytical approach termed Mean Field Homogenization (MFH), based on the properties of individual phases and micro-topology. This is combined with a phenomenological ductile fracture initiation criterion formulated in stress space at the microscopic scale. Localization enhanced kinematics are introduced at the macro-scale when instability is signaled by a local bifurcation analysis of the homogenized material. Discontinuities in the strain field are introduced into a quadrilateral shell based on the weak discontinuity approach. Fracture properties and flow curves up to large strains are determined from single phase tensile experiments using digital image correlation. The predictions of the integrated MFH and fracture model is compared with experimental results on steel sheets with different thermal histories, in terms of fracture prediction and and overall mechanical properties

sted, utgiver, år, opplag, sider
Auerbach: Verlag Wissenschaftliche Scripten , 2015. s. 755-763
Serie
CHS2-Series ; 5
HSV kategori
Forskningsprogram
Hållfasthetslära; Maskinelement
Identifikatorer
URN: urn:nbn:se:ltu:diva-27482Lokal ID: 0f433d10-620c-4da7-bff7-72e03ee5e644ISBN: 9783957350237 (tryckt)OAI: oai:DiVA.org:ltu-27482DiVA, id: diva2:1000666
Konferanse
International Conference on Hot Sheet Metal Forming of High-Performance Steel : 31/05/2015 - 03/06/2015
Merknad
Validerad; 2016; Nivå 1; 20160429 (andbra)Tilgjengelig fra: 2016-09-30 Laget: 2016-09-30 Sist oppdatert: 2018-04-12bibliografisk kontrollert

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Lindkvist, GöranOldenburg, Mats

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Totalt: 348 treff
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