Mechanics of crack curving and branching — a dynamic fracture analysis
Mechanics of crack curving and branching — a dynamic fracture analysis
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DOI：
10.1007/bf00017967
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发表时间：
1985-03
影响因子：
2.5
通讯作者：
M. Ramulu;A. Kobayashi
中科院分区：
文献类型：
--
作者：
M. Ramulu;A. Kobayashi
对动态断裂力学中的裂纹弯曲和分叉准则进行了比较研究，结果表明，基于“超前开裂”概念的准则与现有的实验数据吻合得最好。裂纹分支准则需要一个必要条件，一个临界动应力强度因子，KIb，和一个充分条件，涉及裂纹弯曲准则。该标准被用来预测裂纹弯曲和裂纹分支的动态光弹性实验，涉及Homalite-100和聚碳酸酯断裂试样，以及爆裂钢管和铝管。
A comparative study on crack curving and branching criteria in dynamic fracture mechanics shows that the criteria based on “advanced cracking” concept correlated best with available experimental data. The crack branching criterion requires as a necessary condition, a critical dynamic stress intensity factor,KIb, and a sufficient condition involving the crack curving criterion. The criteria are used to predict crack curving and crack branching in dynamic photoelastic experiments involving Homalite-100 and polycarbonate fracture specimens, as well as bursting steel and aluminum pipes.