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

L. Morini, A. Piccolroaz, G. Mishuris, E. Radi

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Abstract

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.

Original languageEnglish
Pages (from-to)1437-1448
Number of pages12
JournalInternational Journal of Solids and Structures
Volume50
Issue number9
Early online date05 Feb 2013
DOIs
Publication statusPublished - 01 May 2013

Keywords

  • Interfacial crack
  • Stroh formalism
  • Weight functions
  • Betty Identity
  • Singular integral
  • 3-DIMENSIONAL GREENS-FUNCTIONS
  • SYMMETRIC WEIGHT-FUNCTIONS
  • SOLIDS
  • PERTURBATION
  • ANTIPLANE
  • CONSTANTS
  • MEDIA
  • MODEL

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