Numerical prediction of crack propagation by an enhanced element-free Galerkin method

Sang-Ho Lee, Young Cheol Yoon

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

An enhanced element-free Galerkin (EFG) method with enhancement functions is proposed to improve the solution accuracy for linear elastic fracture problem. The enhancement functions are added to the conventional EFG approximation for the implicit description of near-tip field. The discontinuity of crack surface is efficiently modeled by introducing a discontinuity function. Essential boundary conditions are enforced with the penalty method and a coupling with finite element. The proposed method models the crack growth implicitly without node operation so that the initial node arrangement is not modified until the end of analysis. Numerical examples for various crack problems show the robustness of the proposed method by examining the stress intensity factor, near-tip stress field and errors.

Original languageEnglish
Pages (from-to)257-271
Number of pages15
JournalNuclear Engineering and Design
Volume227
Issue number3
DOIs
Publication statusPublished - 2004 Feb 1

Fingerprint

Galerkin method
crack propagation
Galerkin methods
Crack propagation
crack
discontinuity
cracks
prediction
predictions
Cracks
surface cracks
stress intensity factors
augmentation
penalties
Stress intensity factors
stress field
stress distribution
boundary condition
Boundary conditions
boundary conditions

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Safety, Risk, Reliability and Quality
  • Waste Management and Disposal
  • Mechanical Engineering

Cite this

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Numerical prediction of crack propagation by an enhanced element-free Galerkin method. / Lee, Sang-Ho; Yoon, Young Cheol.

In: Nuclear Engineering and Design, Vol. 227, No. 3, 01.02.2004, p. 257-271.

Research output: Contribution to journalArticle

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