Simulation of ultrasonic wave propagation in solids

Abstract

Comprehensive understanding of the dynamics of the processes taking place in the testing specimen is available only by solving partial differential equations by finite element or finite differences method. However, even for small practical problems they appear to be of little effectiveness, because of great computer resources (time and memory) usage. The situation can be improved by developing efficient algorithms of numerical modeling based on deeper analysis of the wave propagation phenomenon. As a result of the analysis, the finite element procedure in regular quadrilateral and free triangular finite element meshes was developed and adopted for the short wave propagation modeling in NDT processes. Proposed technique is nearly 10 times faster than commercial code ANSYS, and, on the other hand, enables to create and analyze models, solution of which is practically impossible by most commercially available finite element codes, because of model size limitation.