A numerical modeling of contact SH-wave transducers

This paper discusses a numerical modeling of contact SH-wave transducers in conjunction with a BEM-based simulation technique for an ultrasonic testing. In the modeling, transmitters are modeled as distributed traction on the area of contact and receivers as a weight function to emulate averaging effect due to finite dimensions of receivers. The whole testing system is firstly formulated as an integral equation that involves the traction and the weight function. Using the integral equation, those unknown functions are then estimated from experimental data. In the last part of this paper, to examine validity of our modeling approach a numerical simulation of a pulse echo test is carried out and results are compared with experiments.