扭转(腹足类)
材料科学
振幅
分叉
复合材料
裂缝闭合
铜
结构工程
打滑(空气动力学)
断裂力学
冶金
非线性系统
物理
热力学
工程类
光学
外科
医学
量子力学
作者
Jin Yue Liu,R. H. Li,Ji Chen
标识
DOI:10.3989/revmetalm.248
摘要
Because the growth behaviors of fatigue cracks are crucial for the safe assessment of structural components, the crack propagation behaviors of coarse-grained copper (CG Cu) subjected to cyclic torsion combined with different axial static stresses were studied. The crack bifurcation behavior is related to the strain amplitude applied. When the strain amplitude is lower, both the type and the magnitude of axial stress have no significant effect on the direction in which the primary crack branches, which is mainly determined by the position of the maximum normal plane. However, when the strain amplitude is higher, the bifurcated crack deviates visibly from the maximum normal plane, which can be attributed to the high degree of plastic deformation and microcracks caused by slip bands along longitudinal direction.
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