Experimental Evaluation of Ultrasonic Simulation Techniques in Anisotropic Material

The high performance of the available technology provides the possibility to simulate the real life for ultrasonic inspections in terms of primary ultrasonic data like rf-time signals. For isotropic material codes like Generalized Point Source Synthesis (GPSS) of Elastodynamic results. Recently, the codes mentioned above have been extended to operate also in anisotropic material. In a first step the codes GPSS and EFIT have been expanded to work in materials of parallel oriented columnar grain structure with transversely isotropic symmetry. In order to verify these codes a set of experiments was carried out on weld metal pads and on welds of defined grain structure. Radiation, propagation, reflexion on boundaries and interaction of the sound field with defects for the modes "through transmission" and "pulse echo" were simulated and compared with the experiments. The purpose of this work is to present and discuss the results of code verification.