Experimental characterization of material nonlinearity using Lamb waves
Experimental characterization of material nonlinearity using Lamb waves
复制标题
DOI：
10.1063/1.2431467
复制
发表时间：
2007-01-08
影响因子：
4
通讯作者：
Jacobs, Laurence J.
中科院分区：
文献类型：
--
作者：
Bermes, Christian;Kim, Jin-Yeon;Jacobs, Laurence J.
本研究的目的是发展一种精确可靠的方法来测量金属板中传播的兰姆波的二次谐波。在测量这些非线性兰姆波时有两个相关的复杂性，即它们固有的色散和多模性质。为了克服这些问题，本研究结合了时频表示与混合楔形生成和激光干涉检测系统。通过表征两种不同铝板的固有材料非线性，其绝对非线性参数是已知的，从纵波测量所提出的程序的有效性证明。(c)2007年，美国物理学会。
The objective of this research is to develop an accurate and reliable procedure to measure the second order harmonic of a Lamb wave propagating in a metallic plate. There are two associated complications in measuring these nonlinear Lamb waves, namely, their inherent dispersive and multimode natures. To overcome these, this research combines a time-frequency representation with a hybrid wedge generation and laser interferometric detection system. The effectiveness of the proposed procedure is demonstrated by characterizing the inherent material nonlinearity of two different aluminum plates whose absolute nonlinearity parameters are known from longitudinal wave measurements. (c) 2007 American Institute of Physics.