3D simulation of short fatigue crack propagation by finite element crystal plasticity and remeshing

被引：69
|
作者：
Proudhon, H. [1 ]
Li, J. [1 ]
Wang, F. [1 ]
Roos, A. [2 ]
Chiaruttini, V. [2 ]
Forest, S. [1 ]
机构：
[1] PSL Res Univ, MINES ParisTech, MAT Ctr Mat, CNRS,UMR 7633, F-91003 Evry, France
[2] French Aerosp Lab, ONERA, Chatillon, France
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2016年 / 82卷
关键词：
Crystal plasticity; Finite element; Short fatigue crack propagation; Adaptive remeshing; GROWTH; MODEL; DIFFRACTION; DAMAGE;
D O I：
10.1016/j.ijfatigue.2015.05.022
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
An iterative method to simulate 3D fatigue crack propagation in crystalline materials is proposed and demonstrated on simple test cases. The method relies on the computation of a damage indicator based on plastic activity around the crack tip. By post-processing this quantity after a given loading sequence, local crack direction and growth rate are estimated along the crack path. Dedicated remeshing routines allow the crack to propagate in 3D and the iterative process can continue with the updated crack geometry. Two examples in a BCC single crystal featuring different slip systems demonstrate the crack propagation simulations under cyclic loading over distances comparable to the crystal size and with non-regular crack shapes such as zig-zag crack paths. The effect of transferring plastic fields between propagation steps is also analysed. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：238 / 246
页数：9
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