Simulating Angular Flaw Scattering Responses Using a Hierarchical Triangular Meshing Method

In this paper an ultrasonic measurement model is developed using three main elements: 1) a multi‐Gaussian beam model for simulating the ultrasonic wave fields incident on a flaw 2) a hierarchical triangular meshing (HTM) method for representing the flaw geometry and 3) the Kirchhoff approximation for modeling the waves scattered from the flaw Using this measurement model, we have simulated the angular scattering responses for pores, cracks, and stringer‐like flaws. The possibility of using such results for flaw classification studies is discussed.