摘要
通过配置疲劳加载台的扫描电子显微镜,对16MnR钢焊接热影响区(HAZ)疲劳裂纹扩展行为进行了直接动态观察,提出了疲劳裂纹“突跃—转折—分叉”扩展模型,并且建立了包括局部应力强度因子,材料疲劳特性参数和损伤特征长度在内的疲劳裂纹扩展速率计算公式,按该模型计算的结果与试验结果进行了比较,二者基本吻合。
Direct observation was accomplished on the fatigue crack growth behaviour in 16MnR steel weld HAZ with SEM and the fatigue loading equipment. Based on the observed results, an intermittent-kinked-forked fatigue crack growth model was developed and a calculating formulation for fatigue crack growth was established. The formula incorp(?)rates local strecs intensity factor, mechanical, cyclic and fatigue properties as well as a damage length parameter. The predicted values of the model were compared with the experimental data and they ar(?) in a good agreement.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
1992年第4期237-244,共8页
Transactions of The China Welding Institution
