dynamic crack initiation

• 动态裂纹起裂

dynamic crack initiation的用法和样例：

例句

1. However, for the specimen that has a sharp notch close to an ideal crack, the measured fracture toughness is not sensitive to the specimen geometry.
   尖槽切口接近理想裂纹，裂纹起裂始于尖角的顶点，实测的断裂韧度不存在尺寸相关性，即是材料常数。