Finite Difference Time Domain Simulation of Ultrasonic Phased Array Sector Scan for Imaging Embedded Defects in Blocks and Elbows

This paper reports the simulation of phased array ultrasonic wave propagation using Finite Difference Time Domain (FDTD) method to image crack like defects in Aluminum Blocks and Stainless Steel elbow sections. Inclined crack like defects have been considered for the simulation. Experiments were also performed on an Aluminum block with inclined embedded cracks various sizes in order to validate the results of the simulation. The simulation studies were then extended to imaging embedded cracks in an elbow section.