Abstract
The brittle crack propagation and arrest behaviors under high stress intensity factor conditions have been an unsolved problem in the fracture mechanics. Although a numerical model based on the local fracture stress criterion indicated growth of unbroken shear lips due to SIF increasing was a cause of the problem, such model depended on many assumptions and it lacked experimental discussion on the behaviors. This study carried out brittle crack arrest experiments under high SIF condition using wider specimens. The experiments and finite element analyses of them showed that the unbroken shear lip formation was governed by the effective SIF. The numerical model was modified based on this result and the predictions by the modified model showed better agreement with the experimental results than those by the conventional model.
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