摘要
导出了全面反映加载频率影响的裂纹扩展速率(da/dN)_d的计算公式;通过数值计算给出了(da/dN)_d与频率比、阻尼比之间的关系;研制了(da/dN)_d的试验装置,并由实验初步验证了计算结果。
The formula is derived of calculating the influence of loading frequencies on the crack propagation rate (da / dN)d. By using numerical calculation, the relations between (da/ dN)d ,frequency ratio and damp ratio are given, an experimental rig is developed for (da/ dN)d and the calculated results are in agreement with experimental ones.
关键词
动应力
裂纹扩展
加载频率
dynamic stress
frequency
crack propagation
