【摘要】 本文介绍了利用超声波定量测试裂纹失稳扩展的速度、加速度以及动态断裂响应参数等量的原理、方法，并给出了若干实验实例。更多还原

【Abstract】 This paper introduces the principle and the methods of applying ultrasonic waves to the test- ing of the speed, the acceleration and the dynamic cracking parameters of the respondence crack front; some experiments are presented as illustration.更多还原