.. _r5.03.05:

**r5.03.05** Taheri viscoplastic behavior relationship
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**Summary**

This document presents the implementation of the viscoplastic Taheri behavior relationship, available for all isoparametric elements (2D and 3D continuous medium) with the exception of plane stresses. After a presentation of the evolution equations of this law, the system obtained by implicit discretization is described; in particular, it is shown that it always admits a solution.

This model is well suited to describe the response of austenitic steels under cyclic stresses, and in particular the phenomenon of progressive deformation. On the other hand, because of its complexity (two load surfaces, semi-discrete internal variable), it does not seem desirable to use it for different applications (monotonous loading path, for example).




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    Description_du_mod_le
    Formulation_num_rique_de_la_relation_de_comportement
    M_thodes_de_r_solution_num_rique
    Bibliographie
    Description_des_versions_du_document