Crack propagation criteria in three dimensions using the XFEM and an explicit-implicit crack description

M. Baydoun*, T. P. Fries

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

This paper studies propagation criteria in three-dimensional fracture mechanics within the extended finite element framework (XFEM). The crack in this paper is described by a hybrid explicit-implicit approach as proposed in Fries and Baydoun (Int J Numer Methods Eng, 2011). In this approach, the crack update is realized based on an explicit crack surface mesh which allows an investigation of different propagation criteria. In contrast, for the computation of the displacements, stresses and strains by means of the XFEM, an implicit description by level set functions is employed. The maximum circumferential stress criterion, the maximum strain energy release rate criterion, the minimal strain energy density criterion and the material forces criterion are realized. The propagation paths from different criteria are studied and compared for asymmetric bending, torsion, and combined bending and torsion test cases. It is found that the maximum strain energy release rate and maximum circumferential stress criterion show the most favorable results.

Original languageEnglish
Pages (from-to)51-70
Number of pages20
JournalInternational journal of fracture
Volume178
Issue number1-2
DOIs
Publication statusPublished - Nov 2012

Keywords

  • Crack propagation criteria
  • Explicit crack description
  • Extended finite element method
  • Implicit crack description
  • Material forces
  • Maximum circumferential stress
  • Maximum strain energy release rate
  • Minimum strain energy density
  • Three dimensional fracture
  • XFEM

ASJC Scopus subject areas

  • Mechanics of Materials
  • Computational Mechanics
  • Modelling and Simulation

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