Abstract
A 3D elastodynamic model for ultrasonic wave propagation and crack detection in anisotropic materials has been developed. By means of Fourier methods a solution is given for the probe sound field propagating in a half-space or a layered structure. Quasi P-, SV- and SH-mode fields are generated at arbitrary angles. The field interacts with a strip-like crack which is embedded in a half-space or surface breaking in a thick plate with inclined back surface. The probe signal response is calculated via Auld's electromechanical reciprocity relation. Numerical examples of A- and B-scans are presented for transversely isotropic solids.
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