A finite-difference simulation of ultrasonic Lamb waves in metal sheets with experimental verification. This paper describes a simple finite- difference method to simulate Lamb wave modes in plane metal sheets. The simulation is used to predict time- domain histories of field displacements vertical to the sheet at groups of points on the sheet. An experimental rig is developed for transmission and reception of Lamb waves in sheet metal, with adjustable transducer positions on the Lamb wave axis.
Experimental results show good agreement with simulation.