兰姆波速与板疲劳关系的研究

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI:10.1109/SPAWDA.2011.6167239

Wei Lin, Xu Li, Jia qi Wang

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引用次数: 1

摘要

为了研究材料疲劳引起的弹性系数变化对Lamb波不同模态相速度的影响，通过仿真和实验研究了Lamb波的传播特性。研究发现，高阶模态兰姆波的速度位移比低阶模态兰姆波的速度位移对弹性系数的变化更为敏感。在LY-12-CZ铝板中，A3模式的速度位移大约是A0模式的9倍。利用兰姆波的高模态进行无损检测，可以获得较高的灵敏度。

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Study on relationship between the Lamb wave velocity and fatigue of plate

In order to study the influences on the phase velocities of different modes of the Lamb wave due to the variations of elastic coefficients caused by the material fatigue, the propagation characteristics of the Lamb wave are studied by simulations and experiments. It is found that the velocity shift of the high-order mode Lamb wave is more sensitive to the variations of elastic coefficients than that of the low-order mode. In a LY-12-CZ aluminum plate, the velocity shift of the A3 mode is about 9 times larger than that of the A0 mode. Then, high sensitivity can be obtained by using the high modes of the Lamb wave in the nondestructive examinations.

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2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)

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