Plastic yield criterion and hardening of porous single crystals

被引：20

作者：

Paux, J. ^{[1
]}

Brenner, R. ^{[1
]}

Kondo, D. ^{[1
]}

机构：

[1] UPMC Univ Paris 06, Sorbonne Univ, CNRS, UMR 7190,Inst Jean le Rond dAlembert, F-75005 Paris, France

来源：

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES | 2018年 / 132卷

关键词：

Plasticity; Single crystal; Porosity; Micromechanics; NONLINEAR COMPOSITES; NUMERICAL SCHEME; SLIP SYSTEMS; VOID GROWTH; MODEL; DEFORMATION; SIMULATIONS; BEHAVIOR; MICROSTRUCTURE; PREDICTION;

D O I：

10.1016/j.ijsolstr.2017.08.030

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This article presents an assessment of the yield criterion for porous plastic single crystal, proposed by Paux et al. (2015), for face-centred cubic and hexagonal close-packed crystalline structures. Comparisons with reference FFT full-field computations on single voided cubic unit cells, presenting different crystal orientations, show an overall agreement for the different plastic anisotropies considered at low and high triaxiality. An extension of the criterion to hardenable crystals, which takes into account the spatial heterogeneity of the approximate plastic strain field, is further proposed and compared with FE results from the literature for body-centred cubic crystals. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：80 / 95

页数：16

共 57 条

[1] Validating a polycrystal model for the elastoplastic response of magnesium alloy AZ31 using in situ neutron diffraction [J].