Simulation of Ultrasonic Materials Evaluation Experiments Including Scattering Phenomena due to Polycrystalline Microstructure

AbstractTo evaluate and optimize the performance of ultrasonic inspection and evaluation procedures, we employ the Generalized Point Source Superposition technique (GPSS), which allows to simulate the propagation of ultrasonic waves and their interaction with defects. This contribution reports on the combination of GPSS with the theoretical description of ultrasonic scattering phenomena in microscopically inhomogeneous media. The theory comprises phenomena like local and global directional and position dependent scattering effects in macroscopically isotropic polycrystalline materials. The presented work addresses the main ‘ingredients’ of the simulation procedure and the influence of the grain size on the simulation results