Numerical Simulation of Nonlinear Ultrasonic Waves Due to Bi-material Interface Contact

3rd International Symposium on Laser Ultrasonics and Advanced Sensing

Hirose, S.^1 ; Saitoh, T.^2

Department of Mechanical and Environmental Informatics, Tokyo Institute of Technology, Japan^1

Division of Environmental Engineering Science, Gunma University, Japan^2

关键词: Bi-material interfaces;    Implicit Runge-Kutta method;    Interface conditions;    Longitudinal waves;    Non-linear ultrasonic;    Nonlinear waves;    Normal incidence;    Numerical results;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/520/1/012007/pdf
DOI  :  10.1088/1742-6596/520/1/012007

来源: IOP

【 摘 要 】

Boundary integral equations are formulated to investigate nonlinear waves generated by a debonding interface of bi-material subjected to an incident plane wave. For the numerical simulation, the IRK (Implicit Runge-Kutta method) based CQ-BEM (Convolution Quadrature-Boundary Element Method) is developed. The interface conditions for a debonding area, consisting of three phases of separation, stick, and slip, are developed for the simulation of nonlinear ultrasonic waves. Numerical results are obtained and discussed for normal incidence of a plane longitudinal wave onto the nonlinear interface with a static compressive stress.