Premium
Micro‐mechanical studies on the effect of various stress‐states on ductile damage and failure
Author(s) -
Hagenbrock Vanessa,
Gerke Steffen,
Brünig Michael
Publication year - 2016
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201610054
Subject(s) - void (composites) , materials science , constitutive equation , mechanics , structural engineering , stress (linguistics) , statistical physics , composite material , finite element method , physics , engineering , linguistics , philosophy
The paper deals with the effect of different stress states on damage and failure behavior of ductile materials. To be able to model these effects a continuum damage model has been proposed taking into account the dependence of the stress intensity, the stress triaxiality and the Lode parameter on the constitutive equations. The model is based on the introduction of damaged and fictitious undamaged configurations. Only experiments are not adequate enough to determine all constitutive parameters. Therefore, additional three‐dimensional micro‐mechanical simulations of representative volume elements have been performed to get more insight in the complex damage mechanisms. These simulations cover a wide range of different void sizes, void shapes and void distributions. After all, the results from the micro‐mechanical simulations are used to propose the damage equations and to identify corresponding parameters. (© 2016 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)