.. _R5.03.29:

**r5.03.29** Ductile plastic and viscoplastic damage behavior laws GTN and VISC_GTN
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**Summary:**

This document describes the Gurson—Tvergaard—Needleman ductile damage model (GTN). It is available in a local version and with a gradient of internal variables (GRAD_VARI or GRAD_INCO). The modeling of large deformations is accessible via kinematics GDEF_LOG. The behavior can be independent of time (GTN) or viscoplastic (VISC_GTN). In the latter case, plasticity evolves according to a Norton model in which the threshold function intervenes.


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    Domaine_d_application
    Mod_le_continu
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    Bibliographie