In this article, a numerical simulation tool for the calculation and optimization of scanning air-coupled ultrasonic testing (ACUT) of nearly arbitrary multilayer structures with and without flaws based on the elastodynamic finite integration technique (EFIT) is presented. It includes 2-D and 3-D solvers for flat and curved isotropic and anisotropic layered structures in transmission, pulse-echo, and pitch-catch configuration. During the development, special attention was paid to the minimization of computing time in the scanning mode, which was achieved by various measures. The paper presents the freely configurable parameters of the EFIT solver, typical result output, special features, and an optional LabVIEW-based user interface. Along the way, several simulation examples from air-coupled ultrasonic testing are demonstrated.
Schubert et al. (Fri,) studied this question.