| Issue |
MATEC Web Conf.
Volume 80, 2016
NUMIFORM 2016: The 12th International Conference on Numerical Methods in Industrial Forming Processes
|
|
|---|---|---|
| Article Number | 01002 | |
| Number of page(s) | 7 | |
| Section | MS1: Generalized continua and nonlocal formulations | |
| DOI | https://doi.org/10.1051/matecconf/20168001002 | |
| Published online | 24 October 2016 | |
Nonlocal constitutive equations of elasto-visco-plasticity coupled with damage and temperature
1
Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, 2 Rue Linggong, 116024 Dalian, China
2
ICD/LASMIS, UMR-CNRS 6281, University of Technology of Troyes, 12 Rue Marie Curie BP2060, 10000 Troyes Cedex, France
3
Centre des matériaux, UMR-CNRS 7633, MINES ParisTech, BP 87, 91003 Evry Cedex, France
a Corresponding author: khemais.saanouni@utt.fr
In this paper, the nonlocal anisothermal elasto-visco-plastic constitutive equations strongly coupled with ductile isotropic damage, nonlinear isotropic hardening and kinematic hardening are developed to model the material behaviour under finite strain. The new micromorphic variable of damage is introduced into the principle of virtual power and new additional balance equations are obtained. Thermodynamically-consistent nonlocal constitutive equations are then deduced. The evolution equations are deduced from the generalized normality rule for the Norton-Hoff visco-plastic potential. This model is used to simulate various material responses under different velocities at high temperature. The micromorphic parameters of damage: micromorphic density and H moduli are studied to examine the effects of micromorphic damage. Biaxial tension is performed to make a comparison between the local damage model and the micromorphic damage model.
© The Authors, published by EDP Sciences, 2016
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