Modeling of Creep-Controlled Crack Growth

The foregoing experimental observations strongly suggested the connection between creep deformation at or near the crack tip and crack growth. For steady-state crack growth, the cooperative deformation at various positions ahead of the crack tip is required. The material at these positions experiences different levels of plastic strain and is subject to different flow stresses. The observed K dependence, therefore, represents the integrated effect and would have to be determined 

Subcritical Crack Growth Creep-Controlled Crack Growth 

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