| 复合加载下疲劳裂纹扩展速率研究 |
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| 引用本文： | 朱平 沙江波. 复合加载下疲劳裂纹扩展速率研究[J]. 固体力学学报, 1994, 15(3): 272-276 |
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| 作者姓名： | 朱平 沙江波 |
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| 作者单位： | 清华大学，西安交通大学 |
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| 摘 要： | 本文提出了一种计算曲折裂纹尖端应力强度因子的简单方法。对一种油井钻杆材料在不同Ⅰ－Ⅱ复合比加载下的疲劳裂纹扩展行为的研究表明，Ⅱ型成分成对裂纹扩展速率有两种趋势相反的影响作用，并得到了一个计算复合型裂纹扩展速率的Ｐａｒｉｓ形式的公式。
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| 关 键 词： | 疲劳裂纹扩展 应力强度因子 |
A STUDY ON FATIGUE CRACK GROWTH RATE UNDER MIXED MODE LOADING |
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| Zhu Ping, Sha Jiangbo, Deng Zengjie. A STUDY ON FATIGUE CRACK GROWTH RATE UNDER MIXED MODE LOADING[J]. Acta Mechnica Solida Sinica, 1994, 15(3): 272-276 |
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| Authors: | Zhu Ping Sha Jiangbo Deng Zengjie |
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| Abstract: | A simple method for calculating the stress intensity factors at a kinked crack tip was proposed in this paper. The study of fatigue crack growth rate for one kind of oil drill pipe materials under various mixed mode loading shows that the mode II component has two kinds of opposite influence to the crack growth. The rate of crack growth in different mixed mode conditions is found to be expressed by the following function:da/dN= |
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| Keywords: | mixed mode fatigue crack growth stress intensity factor |
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