Crack growth under biaxial compression
Crack growth under biaxial compression
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DOI：
10.1016/s0013-7944(02)00015-2
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发表时间：
2002-12
影响因子：
5.4
通讯作者：
E. Sahouryeh;A. Dyskin;L. Germanovich
中科院分区：
文献类型：
--
作者：
E. Sahouryeh;A. Dyskin;L. Germanovich
本文对双轴压缩下三维裂纹扩展进行了实验和分析研究。测试是在不同的材料上进行的，包括透明树脂样品，每个样品都有一个嵌入的圆盘状裂纹。这些裂纹平行于载荷方向扩展，导致开裂。这种行为是显着不同的单轴压缩下观察到的裂纹扩展的大小是有限的，是不是能够在自己的诱导失败。中间主压应力的存在从根本上改变了裂纹扩展机制。提出了一个模型，其中增长的裂纹被表示为一个盘状裂纹平行于加载方向，并在其中心的一对集中力打开。结果表明，裂纹的增长是稳定的，直到它达到一个尺寸相当于它的距离自由表面。
An experimental and analytical investigation into three-dimensional crack growth under biaxial compression is presented. Tests were carried out on different materials, including transparent resin samples, each with a single embedded disk-like crack. These cracks grew extensively parallel to the load directions causing splitting. This behaviour is markedly different from that observed under uniaxial compression where the crack growth is limited in size, and is not capable on its own to induce failure. The presence of the intermediate principal compressive stress radically changes the mechanism of crack growth. A model is proposed where the growing crack is represented as a disk-like crack oriented parallel to the loading direction and opened by a pair of concentrated forces at its centre. It is shown that the crack growth is stable until it reaches a size comparable to its distance from the free surface.