作　　者： ; ; ;

机构地区： 华南理工大学土木与交通学院

出　　处： 《北京航空航天大学学报》 2002年第1期116-118,共3页

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SUS30 4钢构件在 5 5 0℃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 . 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.

关 键 词： 疲劳寿命 寿命预测 表面裂纹 弯曲载荷 积分 核反应堆 容器构件 高温受弯构件

领　　域： [核科学技术]