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Effective flow surface of porous materials with two populations of voids under internal pressure: II. full-field simulations

Abstract : 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.
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Submitted on : Monday, December 2, 2013 - 2:20:30 PM
Last modification on : Tuesday, October 19, 2021 - 10:49:42 PM
Long-term archiving on: : Monday, March 3, 2014 - 9:30:23 AM

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Pierre-Guy Vincent, Pierre Suquet, Yann Monerie, Hervé Moulinec. Effective flow surface of porous materials with two populations of voids under internal pressure: II. full-field simulations. International Journal of Plasticity, Elsevier, 2014, 56, pp.74-98. ⟨10.1016/j.ijplas.2013.11.012⟩. ⟨hal-00912637⟩

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