Surface crack and cracks networks in biaxial fatigue

被引：13
|
作者：
Kane, A [1 ]
Doquet, V [1 ]
机构：
[1] Ecole Polytech, CNRS, UMR 7649, Mecan Solides Lab, F-91128 Palaiseau, France
来源：
ENGINEERING FRACTURE MECHANICS | 2006年 / 73卷 / 02期
关键词：
surface cracks; biaxial fatigue; multiple cracking; closure effects;
D O I：
10.1016/j.engfracmech.2005.05.009
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Semi-elliptical fatigue crack growth in 304 L stainless steel, under biaxial loading, was investigated. Compared to those of through-cracks under uniaxial loading, the growth rate of surface cracks is increased by a non-singular compressive stress and reduced by a tensile stress, when R = 0. Plasticity-induced crack closure under biaxial loading was investigated through 3D finite element simulations with node release. Roughness and phase-transformation-induced closure effects were also discussed. The interactions in two-directional crack networks under biaxial tension were investigated numerically. It appears that the presence of orthogonal cracks should not be ignored. The beneficial influence of interaction-induced mode-mixities was highlighted. (c) 2005 Elsevier Ltd. All rights reserved.
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页码：233 / 251
页数：19
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