## Simulations of surface waves generated using laser ultrasonics

Computer programs for solving the thermoplastic equations describing wave generation and propagation caused by the interaction of a laser pulse with a metal surface have been developed over the last several years. One approach is to manipulate the thermoelastic equations using transform techniques and then use numerical methods to invert the equations and solve for wave displacements. Another approach is to spatially discretize the geometry of the model using finite elements and integrate the equations of motion through time. The finite element formulation may be fully coupled or as a further approximation the thermal problem can be solved separately frommore »