北京航空航天大学学报 ›› 2002, Vol. 28 ›› Issue (1): 116-118.

• 论文 • 上一篇    下一篇

高温受弯构件表面裂纹疲劳扩展寿命预测

黄培彦1, 罗毅1, 费斌军2   

  1. 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
  • 收稿日期:2000-07-11 发布日期:2010-11-19
  • 作者简介:黄培彦(1952-),男,广东人,教授,510640,广州.
  • 基金资助:

    广东省自然科学基金资助项目(960255)

Prediction of Surface Fatigue Crack Growth Lives of Structures under Bending Loads at Elevated Temperature

HUANG Pei-yan1, LUO Yi1, FEI Bin-jun2   

  1. 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
  • Received:2000-07-11 Published:2010-11-19

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.

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.

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