Journal
INTERNATIONAL JOURNAL OF PLASTICITY
Volume 56, Issue -, Pages 74-98Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijplas.2013.11.012
Keywords
Ductility; Microstructures; Ideally plastic material; Porous material; Numerical algorithms
Funding
- Labex MEC
- A*Midex [ANR-11-LABX-0092, ANR-11-IDEX-0001-02]
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This study is devoted to the effective plastic flow surface of a bi-porous material saturated by a fluid. Highly irradiated uranium dioxide is a typical example of such a material. In part I of this study, a GTN-type approximation of the effective plastic flow surface has been derived. In this second part, the predictions of this new model are compared with full-field numerical simulations performed with a numerical method based on Fast Fourier Transforms. This method is successfully applied to voided materials with a Gurson matrix where the voids are subjected to internal pressure. Different microstructures containing a large number of spherical or ellipsoidal voids are investigated. The deviation from isotropy of their mechanical response is measured by a new criterion. (c) 2014 Elsevier Ltd. All rights reserved.
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