Similar analysis for piezoelectric materials and anisotropic materials with a crack or elliptical inclusions subjected to uniform loads at infinity its stress intensity factors

Abstract

Piezoelectric materials are widely used as sensors, actuators, etc. Determination of stress intensity factor is important for piezoelectric materials with defects like a crack or inclusion. Analytical research of piezoelectric materials has been conducted enough. However, experimental research of piezoelectric materials is scarce because of difficulty of mechanical handling. Therefore, determination method of stress intensity factor for piezoelectric materials is not fully-established. In this study, we focused on the similarity of analytical theory between piezoelectric materials and anisotropic materials. Based on the similarity, stress distribution around a crack and an elliptical inclusion are shown. Furthermore, methods that estimate stress intensity factor for piezoelectric materials from each physical quantity of anisotropic materials are discussed.