| McEvily公式的改进及其在疲劳扩展寿命评估中的应用 |
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| 引用本文： | 康健,左宪章,师小红,王建斌,孙钦蕾. McEvily公式的改进及其在疲劳扩展寿命评估中的应用[J]. 军械工程学院学报, 2007, 19(1): 35-38 |
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| 作者姓名： | 康健 左宪章 师小红 王建斌 孙钦蕾 |
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| 作者单位： | 军械工程学院电气工程系 河北石家庄050003 |
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| 摘 要： | 疲劳裂纹扩展寿命评估的关键是要有适宜的疲劳裂纹扩展公式。通过对McEvily公式的深入研究,综合考虑弹塑性行为的影响、裂纹的闭合效应,并对曲线斜率进行“最小二乘法”拟合,得到了改进的McEvily公式。采用某航天发射塔架A3钢的疲劳裂纹扩展数据进行分析验证,得出McEvily改进公式对疲劳裂纹扩展寿命具有更强的评估能力。
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| 关 键 词： | 裂纹闭合效应 McEvily改进公式 寿命评估 |
| 文章编号： | 1008-2956(2007)01-0035-04 |
| 修稿时间： | 2006-06-12 |
Improved McEvily Formula and Its Application in Life Evaluation of Fatigue Crack Growth |
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| KANG Jian,ZUO Xian-zhang,SHI Xiao-hong,WANG Jian-bin,SUN Qinlei. Improved McEvily Formula and Its Application in Life Evaluation of Fatigue Crack Growth[J]. Journal of Ordnance Engineering College, 2007, 19(1): 35-38 |
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| Authors: | KANG Jian ZUO Xian-zhang SHI Xiao-hong WANG Jian-bin SUN Qinlei |
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| Abstract: | An appropriate fatigue crack growth formula is the key to evaluating fatigue growth life.Through research on the McEvily formula and the effect of elastic-plastic behavior and crack closure,the slope is fitted with least square method and an improved McEvily formula is obtained.The improved McEvily is validated with fatigue crack growth data from A3 steel on the umbilical tower of a space center.The results show that the improved formula has better evaluation accuracy. |
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| Keywords: | crack closure improved McEvily life evaluation |
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