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| 高温受弯构件表面裂纹疲劳扩展寿命预测 | |
| 引用本文： | 黄培彦,罗毅,费斌军.高温受弯构件表面裂纹疲劳扩展寿命预测[J].北京航空航天大学学报,2002,28(1):116-118. |
| 作者姓名： | 黄培彦 罗毅 费斌军 |
| 作者单位： | 1. 北京航空航天大学 飞行器设计与应用力学系; 2. 北京航空航天大学 |
| 基金项目： | 广东省自然科学基金;960255; |
| 摘 要： | 基于J-积分半经验公式建立了构件表面裂纹在其长度和深度方向上的疲劳扩展速率表达式,用来预计模拟SUS304钢构件在550℃高温环境中受弯曲载荷作用下表面裂纹的疲劳扩展寿命.并在相同条件下进行了疲劳裂纹扩展试验.结果表明,预测曲线与实验数据基本一致,证明了本文预测方法的有效性. |
| 关 键 词： | 疲劳寿命 预测 表面裂纹 弯曲载荷 J-积分 |
| 文章编号： | 1001-5965(2002)01-0116-03 |
| 收稿时间： | 2000-07-11 |
| 修稿时间： | 2000年7月11日 |
Prediction of Surface Fatigue Crack Growth Lives of Structures under Bending Loads at Elevated Temperature |
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| HUANG Pei-yan,LUO Yi,FEI Bin-jun.Prediction of Surface Fatigue Crack Growth Lives of Structures under Bending Loads at Elevated Temperature[J].Journal of Beijing University of Aeronautics and Astronautics,2002,28(1):116-118. | |
| Authors: | HUANG Pei-yan LUO Yi FEI Bin-jun |
| Institution: | 1. South China University of Technology, College of Traffic and Communications; 2. Beijing University of Aeronautics and Astronautics, Dept. of Flight Vehicle Design and Applied Mechanics |
| Abstract: | Based on an empirical J-integral equation proposed earlier, surface fatigue crack growth rates along crack length and depth directions including the J-integral were developed. Using these expressions, the crack growth lives of a SUS304 steel at 550℃ under bending loads are predicted. The fatigue crack growth experiment was carried out in the same condition. The results showed that the predicted curves of crack length and crack depth vs number of cycles agree well with the experimental data. It proved that the method described were available. |
| Keywords: | fatigue life predictions surface cracks bending loads J integral |
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