Two-dimensional numerical estimation of stress intensity factors and crack propagation in linear elastic analysis

Abdulnaser M. Alshoaibi, M. S A Hadi, Ahmad Kamal Ariffin Mohd Ihsan

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

An adaptive finite element method is employed to analyze two-dimensional linear elastic fracture problems. The mesh is generated by the advancing front method and the norm stress error is taken as a posteriori error estimator for the h-type adaptive refinement. The stress intensity factors are estimated by a displacement extrapolation technique. The near crack tip displacements used are obtained from specific nodes of natural six-noded quarter-point elements which are generated around the crack tip defined by the user. The crack growth and its direction are determined by the calculated stress intensity factors as the maximum circumference theory is also been involved in determining the direction. In evaluating the accuracy of the estimated stress intensity factors, five cases are tested consisting compact tension specimen, three-points bending specimen, double edge notched plate, central cracked plate and single edge cracked plate. These comprehensive tests are carried out and compared to the results from other studies. The crack trajectories for all of these specimen tests are also illustrated.

Original languageEnglish
Pages (from-to)15-27
Number of pages13
JournalSID Structural Integrity and Durability
Volume3
Issue number1
Publication statusPublished - 2007

Fingerprint

Crack Propagation
Stress Intensity Factor
Stress intensity factors
Crack propagation
Crack Tip
Crack tips
Adaptive Finite Element Method
Adaptive Refinement
A Posteriori Error Estimators
Circumference
Crack Growth
Extrapolation
Crack
Trajectories
Mesh
Trajectory
Cracks
Norm
Finite element method
Vertex of a graph

Keywords

  • Adaptive refinement
  • Crack propagation
  • Linear elastic fracture mechanics
  • Stress intensity factors

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics
  • Building and Construction

Cite this

Two-dimensional numerical estimation of stress intensity factors and crack propagation in linear elastic analysis. / Alshoaibi, Abdulnaser M.; Hadi, M. S A; Mohd Ihsan, Ahmad Kamal Ariffin.

In: SID Structural Integrity and Durability, Vol. 3, No. 1, 2007, p. 15-27.

Research output: Contribution to journalArticle

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