| 缺口小裂纹的疲劳扩展速率 |
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| 引用本文： | 徐励,纪炳炎.缺口小裂纹的疲劳扩展速率[J].北京科技大学学报,1991,13(6):604-607. |
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| 作者姓名： | 徐励 纪炳炎 |
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| 作者单位： | 中国计量科学研究院
(徐励)，北京科技大学数力系(纪炳炎) |
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| 摘 要： | 将复型技术应用于疲劳小裂纹扩展试验中的裂纹长度测量。在等载荷比R=0.1、不同平均载荷水平影响的疲劳条件下,板试样V型缺口小裂纹疲劳扩展速率做了试验测试;通过结果分析,提出了缺口小裂纹疲劳扩展速率表达式,并以εp为控制参数,求出45~#钢的计算式。
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| 关 键 词： | 裂纹 疲劳 扩展速率 小裂纹 |
On the Short Fatigue Crack Propagation Rate at Notch |
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| Xu Li Ji Bingyan National Institute of Metrology,Beijing epartment of Mathematics and Mechanics.On the Short Fatigue Crack Propagation Rate at Notch[J].Journal of University of Science and Technology Beijing,1991,13(6):604-607. |
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| Authors: | Xu Li Ji Bingyan National Institute of Metrology Beijing epartment of Mathematics and Mechanics |
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| Abstract: | Reconstructed model technique is successfully applied to measure short fatigue crack length in the testing work. According to elastic-plastic fracture mechanics method, it is put forward an estimated formula for short fatigue crack propagation rate at notch. Using ep (effective plastic strain range of crack tip) as a controlling parameter, the solution to the normalizing problem of propagation rate of short fatigue crack as well as long fatigue crack at notch for 45# steel are given. |
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| Keywords: | short crack fatigue propagation rate |
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