Scatter of elastic waves by a thin flat elliptical inhomogeneity

INTRODUCTION The interaction of elastic waves with material inhomogeneities such as second-phase particles and cracks plays an important role in material and fracture characterization by quantitative ultrasonics [1,2]. These inhomogeneities represent mis-matches in material moduli as well as mass density compared with the surrounding matrix material and thereb) generate elastodynamic fields in addition to the fields when they are absent. These fields are referred to as the scattered fields when