fatigue crack propagation test

例句：

1. 1. The fatigue crack propagation test was conducted to determine the material's resistance to fatigue failure.
   进行了疲劳裂纹扩展试验，以确定材料抵抗疲劳失效的能力。
2. 2. During the fatigue crack propagation test, the specimen was subjected to cyclic loading.
   在疲劳裂纹扩展试验期间，试样经受了循环加载。
3. 3.The results of the fatigue crack propagation test were used to optimize the design of the structural components.
   疲劳裂纹扩展试验的结果被用于优化结构组件的设计。