Numerical Analysis of the Nonlinear Interactions Between Lamb Waves and Microcracks in Plate

作     者：Hongtao Lv Jingpin Jiao Bin Wu Cunfu He 

作者机构：Department of Mechanical Engineering and Applied Electronics TechnologyBeijing University of TechnologyBeijing 100124China 

出 版 物：《Acta Mechanica Solida Sinica》 (固体力学学报（英文版）)

年 卷 期：2019年第32卷第6期

页      面：767-784页

核心收录：

学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学] 

基　　金：supported by the National Key Research and Development Program of China(Grant No.2016YFF0203002) National Natural Science Foundation of China(Grant Nos.11572010,11572011) 

主　　题：Nonlinear ultrasonic Lamb wave mixing Resonant condition Microcrack Finiteelement method 

摘      要：In this paper,three-dimensional finite-element modeling is conducted to investigate the nonlinear interactions between Lamb waves and *** simulation research focuses on the influence of microcrack orientation on the propagation direction of generated sum-frequency Lamb *** simulation results show that the resonant conditions based on classical nonlinear theory are valid for such interactions,leading to the generation of transmitted and reflected sum-frequency SO waves(SFSWs).Moreover,the propagation directions of these two SFSWs exhibit different trends with respect to the orientations of *** transmitted SFSW can be used to detect microcracks,whereas the reflected one can be used to measure their orientations.