| 深埋椭圆形片状裂纹的偏折扩展 |
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| 引用本文： | 任中俊,彭向和,胡宁,刘小会. 深埋椭圆形片状裂纹的偏折扩展[J]. 力学学报, 2009, 41(2): 200-206. DOI: 10.6052/0459-1879-2009-2-2007-364 |
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| 作者姓名： | 任中俊 彭向和 胡宁 刘小会 |
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| 作者单位： | 重庆大学资源及环境科学学院力学系,400044重庆大学资源及环境科学学院力学系,400044重庆大学资源及环境科学学院力学系,400044重庆大学资源及环境科学学院力学系,400044 |
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| 基金项目： | 国家自然科学基金(50728504);;日本学术振兴会(L08538)资助项目~~ |
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| 摘 要： | 基于无限大弹性基体深埋椭圆形片状裂纹的变形场，推导了椭圆形片状裂纹的能量释放率，采用能量平衡方法建立了椭圆形片状裂纹承受拉应力和剪应力时的复合断裂准则. 考虑裂纹在拉-剪应力作用下的偏折扩展，分析了裂纹的偏折方向，提出了椭圆形片状裂纹发生偏折扩展时的初始偏折位置的确定方法.
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| 关 键 词： | 椭圆形裂纹 能量释放率 复合断裂准则 偏折扩展 |
| 收稿时间： | 2007-08-01 |
KINKED GROWTH OF AN EMBEDDED ELLIPTIC CRACK |
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| Ren Zhongjun , Peng Xianghe , Hu Ning , Liu Xiaohui. KINKED GROWTH OF AN EMBEDDED ELLIPTIC CRACK[J]. chinese journal of theoretical and applied mechanics, 2009, 41(2): 200-206. DOI: 10.6052/0459-1879-2009-2-2007-364 |
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| Authors: | Ren Zhongjun Peng Xianghe Hu Ning Liu Xiaohui |
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| Affiliation: | Department of Engineering Mechanics, Chongqing University, Chongqing, 400044, ChinaDepartment of Engineering Mechanics, Chongqing University, Chongqing, 400044, ChinaDepartment of Engineering Mechanics, Chongqing University, Chongqing, 400044, ChinaDepartment of Engineering Mechanics, Chongqing University, Chongqing, 400044, China |
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| Abstract: | Based on the deformation field in an infinite isotropic elastic matrix with an embedded elliptic crack and subjected to combined tensile and shear stress,the energy release rate and a mixed-mode fracture criterion are obtained with an energy balance approach.Furthermore,an analytical approach is suggested for the determination of the initial kink location and direction of the embedded elliptic crack. |
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| Keywords: | elliptic crack energy release rate mixed fracture criterion kinked growth |
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