Propagation of a mode-Ill interfacial crack in a piezoelectric-piezomagnetic bi-material

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:49

Article

Chen, Hao-sen⁴  Wei, Wei-yi⁴  Liu, Jin-xi¹  Fang, Dai-ning^2,3 

[1] Shijiazhuang Tiedao Univ, Dept Engn Mech, Shijiazhuang 050043, Peoples R China

[2] Peking Univ, LTCS, Beijing 100871, Peoples R China

[3] Peking Univ, Coll Engn, Beijing 100871, Peoples R China

[4] Tsinghua Univ, Dept Engn Mech, Beijing 100084, Peoples R China

关键词: Dynamic fracture;    Piezoelectric-piezomagnetic composite;    Intensity factors;    Universal functions;    Bleustein-Gulyaev wave;    Generalized Maerfeld-Tournois wave;   

DOI  :  10.1016/j.ijsolstr.2012.05.013

来源: Elsevier

【 摘 要 】

The transient response of a semi-infinite mode-Ill interfacial crack propagating between piezoelectric (PE) and piezomagnetic (PM) half spaces is investigated in this paper. The integral transform method together with the Wiener-Hopf and Cagniard-de Hoop techniques is used to solve the mixed boundary value problem under consideration. The existence of generalized Maerfeld-Tournois interfacial wave is discussed and the solutions of the coupled fields are derived for four different cases of bulk shear wave velocity. The dynamic intensity factors of stress, electric displacement and magnetic induction as well as energy release rate (ERR) are obtained in explicit forms. The numerical results of the universal functions and dimensionless ERR for several different material combinations are presented and discussed in details. It is found that the Bleustein-Gulyaev (generalized Maerfeld-Tournois) waves dominate the dynamic characteristics of the interfacial crack propagation in PE-PM bi-material. (C) 2012 Elsevier Ltd. All rights reserved.

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