| 脆性断裂的非局部力学理论 |
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| 引用本文： | 程品三. 脆性断裂的非局部力学理论[J]. 力学学报, 1992, 24(3): 329-338. DOI: 10.6052/0459-1879-1992-3-1995-745 |
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| 作者姓名： | 程品三 |
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| 作者单位： | 中科院力学所非线性力学国家重点实验室，100080 |
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| 摘 要： | 本文提出一种脆性材料断裂的非局部力学理论,内容包括:Ⅰ、Ⅱ、Ⅲ型Griffith裂纹的非局部弹性应力场,裂纹尖端邻域非局部弹性应力场的渐近形式,脆性开裂的最大拉应力准则。文中给出了这种理论应用于三种基本型裂纹和Ⅰ-Ⅱ、Ⅰ-Ⅲ复合型裂纹临界开裂条件的计算结果,并把它们与一些试验资料和最小应变能密度因子理论进行了对比。
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| 关 键 词： | 脆性断裂 弹性力学 非局部力学 |
NONLOCAL THEORY OF BRITTLE FRACTURE |
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| Cheng Pinsan. NONLOCAL THEORY OF BRITTLE FRACTURE[J]. chinese journal of theoretical and applied mechanics, 1992, 24(3): 329-338. DOI: 10.6052/0459-1879-1992-3-1995-745 |
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| Authors: | Cheng Pinsan |
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| Abstract: | In this paper, a nonlocal theory of fracture for brittle materials has beenproposed. It contains the nonlocal elastic stress fields of mode-I, II, III Griffith cracks, the asymptotic forms of the stress fields at the neighborhood of the crack tips, and the maximum tensile stress criterion of brittle fracture. As an application of the theory, the fracture criteria of cracks of mode-I, II, III and mixed mode I-II, I-III are given in detail and compared with some experimental data and the theoretical results of minimum factor of strain energy density. |
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| Keywords: | brittle fracture nonlocal elasticity theory maxifmum tensile stress criterion |
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