文献类型：期刊文献

英文题名：Numerical Investigations on Localization of Material Degradation Using Guided Mixing Wave

作者：Tang, Bo[1]; Sun, Maoxun[1]; Zhu, Wujun[1]; Xiang, Yanxun[1]; Xuan, Fuzhen[1]; Deng, Mingxi[2]

机构：[1] MOD, School of Mechanical and Power Engineering, East China University of Science and Technology, Key Laboratory of Pressure Systems and Safety, Shanghai, 200237, China; [2] College of Aerospace Engineering, Chongqing University, Chongqing, 400044, China

年份：2018

卷号：2018-October

外文期刊名：IEEE International Ultrasonics Symposium, IUS

收录：EI(收录号：20190506443796)

语种：英文

外文关键词：Guided electromagnetic wave propagation - Acoustics - Surface waves - Numerical methods - Nondestructive examination

摘要：Nonlinear guided waves mixing technology gains an ascending attention in nondestructive testing field as its capability to resist measuring device nonlinearity. However, recent studies in this topic mainly focus on theoretical analysis. In this article, Lamb waves counter-propagating mixing is explored using a numerical simulation method. Two fundamental Lamb modes(S0 at 1.13 and S0 at 1.82MHz) are selected based on the internal resonance criteria. The mixing wave mode is S1 at 2.95 MHz. A local microdefect is simulated by employing hyperelastic material properties in some regions. Results show that there is a positive correlation of nonlinear acoustic parameter and material degradation level in mixing zone and there is no correlation between nonlinear acoustic parameter and material degradation in fundamental waves propagating routine, which indicate that mixing signal is sensitive to local material defects. ? 2018 IEEE.