Plastic yield criterion and hardening of porous single crystals

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:132

Article

Paux, J.¹  Brenner, R.¹  Kondo, D.¹ 

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

关键词: Plasticity;    Single crystal;    Porosity;    Micromechanics;   

DOI  :  10.1016/j.ijsolstr.2017.08.030

来源: Elsevier

【 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.

【 授权许可】

Free