Modeling of edge cracks interaction
Modeling of edge cracks interaction
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DOI：
10.3221/igf-esis.36.02
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发表时间：
2016-03
期刊：
影响因子：
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通讯作者：
V. Petrova;S. Schmauder;A. Shashkin
中科院分区：
文献类型：
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作者：
V. Petrova;S. Schmauder;A. Shashkin
从实验和理论研究可知，裂纹对几何形状敏感，例如，与负载的倾斜角度有关。一个小的偏离正常方向的拉伸载荷的裂纹会导致附近的裂纹尖端的混合模式的条件，导致偏离其初始扩展方向的裂纹。此外，其他裂纹、不均匀性、表面及其相互作用的存在导致额外的变形和应力，这些变形和应力也对裂纹扩展的开始和扩展的方向产生影响。本文的目的是显示的影响，相互作用的边缘裂纹进一步裂纹的形成。给出了主要的断裂特征，如应力强度因子、断裂角和临界载荷。对不同几何形状的任意倾斜边缘裂纹，给出了一系列的说明性例子
From experimental and theoretical investigations it is known that cracks are sensitive to geometry, e.g., to the inclination angle to the load. A small deviation of a crack from the normal direction to a tensile load causes mixed mode conditions near the crack tip which lead to deviation of the crack from its initial propagation direction. Besides, the presence of other cracks, inhomogeneities, surfaces and their interaction causes additional deformations and stresses which also have influence on the initiation of the crack propagation and on the direction of this propagation. The aim of this paper is to show the effects of the interaction of edge cracks on further crack formation. The main fracture characteristics, such as, stress intensity factors, fracture angles and critical loads are provided in this study. A series of illustrative examples is presented for different geometries of arbitrarily inclined edge cracks