Integral identities for a semi-infinite interfacial crack in anisotropic elastic bimaterials

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:50

Article

Morini, L.^1,3  Piccolroaz, A.^2,3  Mishuris, G.²  Radi, E.¹ 

[1] Univ Modena & Reggio Emilia, Dipartimento Sci & Metodi Ingn, I-42100 Reggio Emilia, Italy

[2] Aberystwyth Univ, Inst Math & Phys Sci, Ceredigion SY23 3BZ, Wales

[3] Univ Trento, Dept Civil Environm & Mech Engn, I-38123 Trento, Italy

关键词: Interfacial crack;    Stroh formalism;    Weight functions;    Betty Identity;    Singular integral;   

DOI  :  10.1016/j.ijsolstr.2013.01.021

来源: Elsevier

【 摘 要 】

The focus of the article is on the analysis of a semi-infinite crack at the interface between two dissimilar anisotropic elastic materials, loaded by a general asymmetrical system of forces acting on the crack faces. Recently derived symmetric and skew-symmetric weight function matrices are introduced for both plane strain and antiplane shear cracks, and used together with the fundamental reciprocal identity (Betti formula) in order to formulate the elastic fracture problem in terms of singular integral equations relating the applied loading and the resulting crack opening. The proposed compact formulation can be used to solve many problems in linear elastic fracture mechanics (for example various classic crack problems in homogeneous and heterogeneous anisotropic media, as piezoceramics or composite materials). This formulation is also fundamental in many multifield theories, where the elastic problem is coupled with other concurrent physical phenomena. (C) 2013 Elsevier Ltd. All rights reserved.

【 授权许可】

Free