Extraction of stress intensity factors for the simulation of 3-D crack growth with the generalized finite element method

J. Garzon, C. A. Duarte, J. P. Pereira

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Two methods for the extraction of Stress Intensity Factors (SIFs) from three-dimensional (3-D) problems are presented: the Contour Integral Method and the Cutoff Function Method. The formulations are tailored for the Generalized Finite Element Method and mixed-mode 3-D propagating cracks. The case of crack faces loaded by prescribed tractions is also considered. Another contribution of this paper is a procedure to control the noise of extracted SIFs based on the Moving Least Squares Method. The proposed approach provides a continuous and smooth approximation of 3-D SIF functions for each fracture mode. Numerical experiments demonstrating the accuracy and robustness of the proposed methodology are presented. They include 3-D mixed-mode fatigue crack growth simulations and the case of a pressurized crack.

Original languageEnglish (US)
Title of host publicationAdvances in Crack Growth Modeling
PublisherTrans Tech Publications Ltd
Pages1-36
Number of pages36
ISBN (Print)9783037857359
DOIs
StatePublished - 2013

Publication series

NameKey Engineering Materials
Volume560
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Keywords

  • Contour integral method
  • Extended finite element method
  • Fracture propagation
  • Generalized finite element method
  • Stress intensity factors

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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