| ELASTIC INTERACTION BETWEEN WEDGE DISCLINATION DIPOLE AND INTERNAL CRACK |
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| 作者姓名： | 方棋洪 刘又文 |
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| 作者单位： | Department of Engineering Mechanics Hunan University Changsha 410082 P. R. China Communicated by FAN Da-jun Original Member of Editorial Committee AMM，Department of Engineering Mechanics Hunan University Changsha 410082 P. R. China Communicated by FAN Da-jun Original Member of Editorial Committee AMM |
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| 摘 要： | The system of a wedge disclination dipole interacting with an internal crack was investigated. By using the complex variable method, the closed form solutions of complex potentials to this problem were presented. The analytic formulae of the physics variables, such as stress intensity factors at the tips of the crack produced by the wedge disclination dipole and the image force acting on disclination dipole center were obtained. The influence of the orientation, the dipole arm and the location of the disclination dipole on the stress intensity factors was discussed in detail. Furthermore, the equilibrium position of the wedge disclination dipole was also examined. It is shown that the shielding or antishielding effect of the wedge disclination to the stress intensity factors is significant when the disclination dipole moves to the crack tips.
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| 关 键 词： | 旋错偶极子 裂缝 复合变量法 象力 |
| 文章编号： | 10.1007/s10483-006-0911-z |
| 收稿时间： | 2005-05-27 |
| 修稿时间： | 2006-06-02 |
Elastic interaction between wedge disclination dipole and internal crack |
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| Qi-hong Fang,You-wen Liu.ELASTIC INTERACTION BETWEEN WEDGE DISCLINATION DIPOLE AND INTERNAL CRACK[J].Applied Mathematics and Mechanics(English Edition),2006,27(9):1239-1247. |
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| Authors: | Qi-hong Fang You-wen Liu |
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| Institution: | Department of Engineering Mechanics, Hunan University, Changsha 410082, P. R. China |
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| Abstract: | The system of a wedge disclination dipole interacting with an internal crack was investigated. By using the complex variable method, the closed form solutions of complex potentials to this problem were presented. The analytic formulae of the physics variables, such as stress intensity factors at the tips of the crack produced by the wedge disclination dipole and the image force acting on disclination dipole center were obtained. The influence of the orientation, the dipole arm and the location of the disclination dipole on the stress intensity factors was discussed in detail. Furthermore, the equilibrium position of the wedge disclination dipole was also examined. It is shown that the shielding or antishielding effect of the wedge disclination to the stress intensity factors is significant when the disclination dipole moves to the crack tips. |
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| Keywords: | disclination dipole crack complex variable method image force |
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