Fracture behavior of an interface crack in a magnetoelectric sandwich structure under electric field: Effects of the poling directions

Author:

Zhao Xing12ORCID,Liu JinXi1,Qian ZhengHua2,Gao CunFa2

Affiliation:

1. State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Department of Engineering Mechanics, Hebei Key Laboratory for Mechanics of Intelligent Materials and Structures, Shijiazhuang Tiedao University, Shijiazhuang, PR China

2. State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, PR China

Abstract

Magnetoelectric (ME) sandwich structure is a common form in device applications. Poling directions of component materials are essential for the improvement of ME device properties. In this paper, the effects of the electric and magnetic poling directions on the interface fracture of a ME sandwich structure are investigated by integral transform and singular integral equation techniques. The expressions of the normalized stress intensity factors (NSIFs) are derived, and some numerical examples are presented. It is found that the poling direction of active layer can greatly affect the interface cracking mode. And the crack propagation can be promoted or impeded by adjusting the applied field. The structure with a larger volume fraction of active material will be more likely to crack.

Publisher

SAGE Publications

Subject

Mechanical Engineering,General Materials Science

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