文献类型：期刊文献

英文题名：Scanning non-collinear wave mixing for nonlinear ultrasonic detection and localization of plasticity

作者：Sun, Maoxun[1];Xiang, Yanxun[1];Deng, Mingxi[2];Xu, Jichao[1];Xuan, Fu-Zhen[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, MOE, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China;[2]Logist Engn Univ, Dept Phys, Chongqing 400416, Peoples R China

年份：2018

卷号：93

起止页码：1

外文期刊名：NDT & E INTERNATIONAL

收录：;EI(收录号：20174004229852);WOS:【SCI-EXPANDED(收录号:WOS:000418222600001)】；

基金：This work was supported by the National Key Research and Development Program of China (2016YFC0801903), National Natural Science Foundation of China (Grant Nos. 51325504, 11474093, 11474361 and 11622430), and the Fundamental Research Funds for the Central Universities (222201718005).

语种：英文

外文关键词：Non-collinear wave mixing; Nonlinear ultrasonic; Plastic deformation; Damage localization

摘要：Non-collinear wave mixing recently has been proposed to detect and localize micro-damage in materials. It is proved sensitive to the interaction angle alpha of the incident waves. In this work, the relationship between the acoustic nonlinearity parameter chi and the alpha is studied by numerical simulations and experimental measurements based on the nonlinear interaction of two shear waves. A single-peak change in the normalized acoustic nonlinearity parameter chi' of the mixing wave versus the incident angle is observed from numerical simulations and then is verified by experiments. The results show a-6 dB decrease of chi' corresponds to a deviation of about 4 degrees in the incident angle. Meanwhile, the detection and localization of plastic deformation is also conducted on an aluminum alloy based on the scanning of non-collinear wave mixing, in which the distribution of the acoustic nonlinearity is similar to that of the plastic strain.