Application of Nonlinear Lamb Wave Mixing Method for Residual Stress Measurement in Metal Plate  

作　　者：Jingpin Jiao Li Li Xiang Gao Quan Cheng Cunfu He Bin Wu 

机构地区：[1]Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China

出　　处：《Chinese Journal of Mechanical Engineering》2023年第1期211-223,共13页中国机械工程学报（英文版）

基　　金：National Natural Science Foundation of China(Grant Nos.11972053,12274012)。

摘　　要：Harmonic nonlinear ultrasound can offer high sensitivity for residual stress measurements;however,it cannot be used for local stress measurements at a point in space and exhibits nonlinear distortions in the experimental system.This paper presents a feasibility study on the measurement of residual stress in a metal plate using a nonlinear Lamb wave-mixing technique.The resonant conditions for two Lamb waves to generate a mixing frequency wave are obtained via theoretical analysis.Finite element simulations are performed to investigate the nonlinear interactions between the two Lamb waves.Results show that two incident A0 waves interact in regions of material nonlinearity and generate a rightward S0 wave at the sum frequency.Residual stress measurement experiments are conducted on steel plate specimens using the collinear Lamb wave-mixing technique.By setting different delays for two transmitters,the generated sum-frequency component at different spatial locations is measured.Experimental results show that the spatial distribution of the amplitude of the sum-frequency component agrees well with the spatial distribution of the residual stress measured using X-rays.The proposed collinear Lamb wave-mixing method is effective for measuring the distribution of residual stress in metal plates.

关 键 词：Residual stress Lamb wave Collinear wave mixing Nondestructive testing Resonant conditions 

分 类 号：TG115.285[金属学及工艺—物理冶金]