Line source representations for shear wave birefringence measurements in transversely isotropic materials using laser ultrasonics

摘要: Line source representations for thermoelastic, laser excitation of transversely isotropic materials are developed to model shear wave birefringence effects that can occur in these materials. Continuum descriptions elastic propagation used generate equations motion solved using transform methods. Analytical solutions presented epicentral waveforms parallel and perpendicular the axis symmetry. These particularly simple allow rapid examination influence various components stiffness tensor on propagation. In particular, symmetry, line orientations this yield two cases demonstrate birefringence. This effect is computed titanium as well a nearly material–both Class I–to highlight diagonal off-diagonal character ultrasonic when referenced principal coordinate system. The results work should be guide interpretation ultrasonic, measurements present.