Distribution of dislocations at a mode I crack tip and their shielding effect |
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| Authors: | Jianqiao Chen Seiichiro Kitaoka |
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| Affiliation: | (1) Dept. of Mechanics, Huazhong Univ. of Science and Technology, Wuhan, 430074, China;(2) Dept. of Mechanical Eng., Tottori Univ., Tottori, 680, Japan |
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| Abstract: | Distribution of dislocations at a finite mode I crack tip is formulated. Closed form solutions for the dislocation distribution function, the dislocation-free zone (DFZ), the local stress intensity factor and the crack tip stress field are obtained. The dislocation distribution has similar features to a mode III crack model. Under a given applied stress, there may exist different configurations of plastic zone and DFZ. Crack tip shielding by dislocations depends on both applied stresses and the configuration. |
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| Keywords: | Distribution of dislocations mode I crack dislocation-free zone crack tip shielding. |
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