Branch cracking and debonding at an end of a rigid stiffener under anti-plane shear stress

作者：Hasebe Norio^*; Keer Leon M

来源：International Journal of Fracture, 2007, 148(4): 303-313.

DOI：10.1007/s10704-008-9203-9

• competition
• debonding
• kinked crack
• stiffener
• branch
• strain energy release rate
• mode III
• anti-plane shear
• longitudinal shear
• mixed boundary value
• cyclic loading
• increasing loading

A semi-infinite body with a rigid stiffener on a part of the surface under uniform anti-plane shear stress is considered. This is a mixed boundary value problem, and a closed and exact solution is obtained. Stress concentration occurs at the ends of the stiffener; therefore a crack or a debonding may occur at the end of the stiffener. This paper investigates the competition between a crack or a debonding occurrence. It also investigates how far the debonding will extend. The maximum strain energy release rate is used as criterion for detecting a crack and a debonding initiation. Also the strain energy release rate just after crack initiation is investigated and the crack initiation angle is 140.8 degrees. As the applied load, the following three kind of loading conditions are considered; constant loading, increasing loading and small cyclic loading.

• 出版日期2007-12
• 单位西北大学