Pre-kinking of a moving crack in a magnetoelectroelastic material under in-plane loading

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:50

Article

Hu, Keqiang¹  Chen, Zengtao¹ 

[1] Univ New Brunswick, Dept Mech Engn, Fredericton, NB E3B 5A3, Canada

关键词: Constant moving crack;    Magnetoelctroelastic material;    Dual integral equations;    Crack kinking;    Hoop stress intensity factor;   

DOI  :  10.1016/j.ijsolstr.2013.04.016

来源: Elsevier

【 摘 要 】

A constant moving crack in a magnetoelectroelastic material under in-plane mechanical, electric and magnetic loading is studied for impermeable crack surface boundary conditions. Fourier transform is employed to reduce the mixed boundary value problem of the crack to dual integral equations, which are solved exactly. Steady-state asymptotic fields near the crack tip are obtained in closed form and the corresponding field intensity factors are expressed explicitly. The crack speed influences the singular field distribution around the crack tip and the effects of electric and magnetic loading on the crack tip fields are discussed. The crack kinking phenomena is investigated using the maximum hoop stress intensity factor criterion. The magnitude of the maximum hoop stress intensity factor tends to increase as the crack speed increases. (C) 2013 Elsevier Ltd. All rights reserved,

【 授权许可】

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