Assessment of accumulated fatigue damage in solid plates using nonlinear Lamb wave approach
Assessment of accumulated fatigue damage in solid plates using nonlinear Lamb wave approach
复制标题
使用非线性兰姆波方法评估实心板的累积疲劳损伤
DOI：
10.1063/1.2714333
复制
发表时间：
2007-03-19
影响因子：
4
通讯作者：
Pei, Junfeng
中科院分区：
文献类型：
--
作者：
Deng, Mingxi;Pei, Junfeng
从理论上分析了利用一次兰姆波传播的非线性效应评估实心板疲劳累积损伤的可行性。在铝板经受不同循环次数的拉-拉疲劳载荷后，在兰姆波具有较强非线性的驱动频率附近进行超声检测。其次是所考虑的兰姆波的二次谐波的振幅-频率曲线的测量。实验结果表明，兰姆波传播的二次谐波效应对固体板的疲劳损伤积累非常敏感。
The feasibility of using the nonlinear effect of primary Lamb wave propagation for assessing accumulated fatigue damage in solid plates is theoretically analyzed. After the aluminum sheets are subjected to tension-tension fatigue loading for different numbers of loading cycles, they are subjected to ultrasonic tests near the driving frequency where Lamb waves have a strong nonlinearity. This is followed by the measurement of the amplitude-frequency curves for second harmonics of the considered Lamb waves. The experimental results show that the effect of second-harmonic generation by Lamb wave propagation is very sensitive to the accumulation of fatigue damage of solid plates.