Authors
Title
Analysis of ductile damage – Comparison between micromechanical models an neutron diffraction experiments
In
Materials Science Forum
Volume
681
Pages
91–96
Publisher
Trans Tech Publications
Year
2011
Indexed by

Abstract
Ductile damage is a consequence of large strains more or less localized. Taking into
account damage in constitutive behaviour of metallic materials is necessary to model various
engineering problems involved in forming processes (stamping, punching, shearing...). It would lead
to accurate predictions introducing microstructural features of materials [1-2]. In the present study,
two crystalline plasticity models including damage effects in the framework of scale transition
methods are investigated. These models are developed and based on different approaches with
direct application to duplex stainless steels. The first approach is a variant of the Berveiller-Zaoui
model in which the effect of ductile damage has been introduced. The second one is a generalized
Cailletaud model taking into account the ductile damage [3-6]. Because of the microstructural
complexity of the chosen materials, some particular developments of the micromechanical
approaches are considered. Moreover, continuous damage mechanics is used at grain scale including
its effect (or coupling) on plastic or elastic-plastic flow with more or less complex hardenings. The
modelling is justified on some previous experimental results in metallic duplex materials [7-8]. The
developed models allow then deducing the macroscopic behaviour of the aggregate with damage
effects from the grains behaviour.
Affiliations
Offprint