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.
Lin Wei Li Xu Wang Jia qi
Dept. Applied Physics, Nanjing University of Aeronautics and Astronautics, Nanjing, 211100, China
国际会议
深圳
英文
260-263
2011-12-09（万方平台首次上网日期，不代表论文的发表时间）