| 复合型裂纹疲劳扩展的新准则 |
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| 引用本文： | 闫相桥,叶建海.复合型裂纹疲劳扩展的新准则[J].哈尔滨工业大学学报,2004,36(12):1627-1630. |
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| 作者姓名： | 闫相桥 叶建海 |
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| 作者单位： | 1. 哈尔滨工业大学,复合材料研究所,黑龙江,哈尔滨,150001
2. 黄河水利职业技术学院,河南,开封,475001 |
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| 基金项目： | 国家自然科学基金资助项目(10272037). |
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| 摘 要： | 把最近提出的及计材料拉压屈服强度不同对材料断裂影响的复合型裂纹断裂准则扩充到疲劳裂纹扩展的情况，建立了一个新的复合型裂纹疲劳扩展准则，进而将位移不连续法(一种边界元方法)和本文提出的复合型裂纹疲劳扩展准则结合在一起，用于数值模拟复合型裂纹疲劳扩展过程．对中心斜裂纹板的疲劳扩展的数值模拟结果揭示了材料拉压屈服强度不同对复合型裂纹疲劳扩展的影响。
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| 关 键 词： | 裂纹 疲劳 断裂 数值模拟 |
| 文章编号： | 0367-6234(2004)12-1627-04 |
| 修稿时间： | 2002年7月11日 |
A new criterion of fatigue growth of mixed-mode crack |
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| YAN Xiang-qiao,YE Jian-hai.A new criterion of fatigue growth of mixed-mode crack[J].Journal of Harbin Institute of Technology,2004,36(12):1627-1630. |
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| Authors: | YAN Xiang-qiao YE Jian-hai |
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| Affiliation: | YAN Xiang-qiao~1,YE Jian-hai~2 |
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| Abstract: | In this paper, a mixed-mode fracture criterion for the materials with different yield strengths in tension and compression is extended to a fatigue loading case to set up a new criterion of fatigue growth of a mixed-mode crack. Moreover, the new criterion is combined with a displacement discontinuity method which is a boundary element method to numerically simulate the fatigue growth process of a mixed mode crack. Numerical analysis of fatigue growth of a center-inclined crack shows the effect of the different yield strengths of materials in tension and compression on fatigue growth process of a mixed mode crack. |
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| Keywords: | crack fatigue fracture numerical simulation |
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