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On the constitutive modeling of dual-phase steels at finite strains: a generalized plasticity based approach

Soldatos, Dimitris; Triantafyllou, Savvas P.; Chatzi, Eleni N.

Authors

Dimitris Soldatos

Savvas P. Triantafyllou

Eleni N. Chatzi



Abstract

In this work we propose a general theoretic framework for the derivation of constitutive equations for dual-phase steels, undergoing continuum finite deformation. The proposed framework is based on the generalized plasticity theory and comprises the following three basic characteristics:

1.A multiplicative decomposition of the deformation gradient into elastic and plastic parts.

2.A hyperelastic constitutive equation

3.A general formulation of the theory which prescribes only the number and the nature of the internal variables, while it leaves their evolution laws unspecified. Due to this generality several different loading functions, flow rules and hardening laws can be analyzed within the proposed framework by leaving its basic structure essentially unaltered.

As an application, a rather simple material model, which comprises a von-Mises loading function, an associative flow rule and a non-linear kinematic hardening law, is proposed. The ability of the model in simulating simplified representation of the experimentally observed behaviour is tested by two representative numerical examples.

Publication Date Jun 30, 2015
Peer Reviewed Peer Reviewed
APA6 Citation Soldatos, D., Triantafyllou, S. P., & Chatzi, E. N. (2015). On the constitutive modeling of dual-phase steels at finite strains: a generalized plasticity based approach
Keywords Dual-phase steels, Generalized plasticity, Finite strains
Related Public URLs http://www.ivp.ethz.ch/...hnology-forum-2015.html
http://e-citations.ethbib.ethz.ch/view/pub:174151
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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