Discussion on electromagnetic crack face boundary conditions for the fracture mechanics of magneto-electro-elastic materials

作     者：Baolin Wang Jiecai Han 

作者机构：Center for Composite Materials Harbin Institute of Technology Harbin 150001 China 

出 版 物：《Acta Mechanica Sinica》 (力学学报（英文版）)

年 卷 期：2006年第22卷第3期

页      面：233-242页

核心收录：

学科分类：08[工学] 080102[工学-固体力学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：The project supported by the National Natural Science Foundation of China (10102004) The English text was polished by Yunming Chen 

主　　题：Fracture mechanics Magnetoelectroelastic materials Boundary conditions Notch Crack 

摘      要：This paper discusses electromagnetic boundary conditions on crack faces in magneto- electroelastic materials, where piezoelectric, piezomagnetic and magnetoelectric effects are coupled. A notch of finite thickness in these materials is also addressed. Four idealized electromagnetic boundary conditions assumed for the crack-faces are separately investigated, i.e. （a） electrically and magnetically impermeable （crack-face）, （b） electrically impermeable and magnetically permeable, （c） electrically permeable and magnetically impermeable, and （d） electrically and magnetically permeable. The influence of the notch thickness on important parameters, such as the field intensity factors, the energy release rate at the notch tips and the electromagnetic fields inside the notch, are studied and the results are obtained in closed-form. Results under different idealized electromagnetic boundary conditions on the crack-face are compared, and the applicability of these idealized assumptions is discussed.