A theoretical note on mode-I crack branching and kinking
2011; Elsevier BV; Volume: 78; Issue: 6 Linguagem: Inglês
10.1016/j.engfracmech.2011.01.023
ISSN1873-7315
AutoresY.J. Xie, Xiaozhi Hu, X.H. Wang, J. Chen, K.Y. Lee,
Tópico(s)High-Velocity Impact and Material Behavior
ResumoAn energy-based fracture mode has been derived for the mode-I crack branching and kinking. The classic Ji-integral has been further explored by a new partial integral path and the analytical solution of the energy release rate for crack branching and kinking from a mode-I crack tip has been established. The crack branching/kinking angle has also been analytically derived. It shows that the Griffith's theorem and conservation law can be applied to both mode-I crack extension and mode-I crack branching and kinking. The branching mechanism for quasi-static mode-I crack has been theoretically investigated. The branching toughness and the K-based criterion for crack branching have been defined. The crack branching phenomena predicted by the present model are in well agreement with the experimental observations reported in the literatures.
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