| Elastic behaviour of a wedge disclination dipole near a sharp crack emanating from a semi-elliptical blunt crack |
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| 作者姓名： | 宋豪鹏 方棋洪 刘又文 |
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| 作者单位： | College of Mechanics and Aerospace, Hunan University,
Changsha 410082, China;College of Mechanics and Aerospace, Hunan University,
Changsha 410082, China;College of Mechanics and Aerospace, Hunan University,
Changsha 410082, China |
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| 基金项目： | Project supported by the National
Natural Science Foundation of China (Grant Nos.~10872065 and
50801025), the Natural Science Foundation of Hunan Province of China
(Grant No.~09JJ4003) and the Hunan Provincial Innovation Foundation
for Postgraduate, China (Grant No.~CX2009B067). |
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| 摘 要： | The interaction between a wedge disclination dipole and a crack emanating from a semi-elliptic hole is investigated.Utilising the complex variable method,the closed form solutions are derived for complex potentials and stress fields.The stress intensity factor at the tip of the crack and the image force acting on the disclination dipole center are also calculated.The influence of the morphology of the blunt crack and the position of the disclination dipole on the shielding effect to the crack and the image force is examined in detail.The results indicate that the shielding or anti-shielding effect to the stress intensity factor increases when the wedge disclination dipole approaches the tip of the crack.The effects of the morphology of the blunt crack on the stress intensity factor of the crack and the image force are very significant.
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| 关 键 词： | wedge disclination dipole blunt crack shielding effect image force |
| 收稿时间： | 2009-01-18 |
Elastic behaviour of a wedge disclination dipole near a sharp crack emanating from a semi-elliptical blunt crack |
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| Song Hao-Peng,Fang Qi-Hong and Liu You-Wen.Elastic behaviour of a wedge disclination dipole near a sharp crack emanating from a semi-elliptical blunt crack[J].Chinese Physics B,2010,19(5):56102-056102. |
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| Authors: | Song Hao-Peng Fang Qi-Hong and Liu You-Wen |
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| Institution: | College of Mechanics and Aerospace, Hunan University,
Changsha 410082, China |
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| Abstract: | The interaction between a wedge disclination dipole and a
crack emanating from a semi-elliptic hole is investigated. Utilising
the complex variable method, the closed form solutions are derived
for complex potentials and stress fields. The stress intensity
factor at the tip of the crack and the image force acting on the
disclination dipole center are also calculated. The influence of the
morphology of the blunt crack and the position of the disclination
dipole on the shielding effect to the crack and the image force is
examined in detail. The results indicate that the shielding or
anti-shielding effect to the stress intensity factor increases when
the wedge disclination dipole approaches the tip of the crack. The
effects of the morphology of the blunt crack on the stress intensity
factor of the crack and the image force are very significant. |
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| Keywords: | wedge disclination dipole blunt crack shielding
effect image force |
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