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Implementation of a constitutive model for the mechanical behavior of TWIP steels and validation simulations

: Erhart, A.; Haufe, A.; Butz, A.; Zapara, M.; Helm, D.


Key engineering materials 651-653 (2015), S.539-544
ISSN: 0252-1059
ISSN: 1013-9826
European Commission EC
RFCS; RFSR-CT-2012-00019; TWIP 4EU
Fraunhofer IWM ()
constitutive model; Simulation; TWIP-Steel

High manganese content TWinning Induced Plasticity (TWIP) steels are promising for the production of lightweight components due to their high strength combined with extreme ductility, see [1]. This paper deals with the implementation of a constitutive model for the macroscopic deformation behavior of TWIP steels under mechanical loading with the aim of simulating metal forming processes and representing the behavior of TWIP-steel components for example under crash loading - with the Finite Element code LS-DYNA® and refers to our recently published papers: [2],[4],[5]. Within the present paper we focus on the implementation of the model formulated in [2] and its extension to stress dependent twinning effects.