Modelling interacting cracks through a level set using the element-free Galerkin method

N. Muthu, S. K. Maiti, Wenyi Yan, B. G. Falzon

Research output: Contribution to journalArticleResearchpeer-review

12 Citations (Scopus)

Abstract

A multiple crack weight technique with a level set method is proposed to model multiple cracks using a coarse meshfree nodal discretization. A new level-set structure is presented to handle multiple cracks and their propagation using the maximum tangential principal stress criterion. The level sets are updated with respect to the new crack tip positions. The problem of modelling interacting cracks in isotropic and bi-materials is studied using a new variant of the element-free Galerkin method. The stress intensity factors (SIFs) and energy release rates for interacting cracks in isotropic and homogenous materials, including a crack at a bi-material interface are determined using the standard interaction integral. Case studies involving crack-crack interactions, doubly and triply kinked cracks are analysed to demonstrate the simplicity and the effectiveness of the proposed approach.

Original languageEnglish
Pages (from-to)203-215
Number of pages13
JournalInternational Journal of Mechanical Sciences
Volume134
DOIs
Publication statusPublished - 1 Dec 2017

Keywords

  • Crack-crack interaction
  • Element-free Galerkin method
  • Interface cracks
  • Level set method
  • Multiple cracks
  • Stress intensity factor

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