Finite element modeling of fatigue crack propagation using a self adaptive mesh strategy

Abdulnaser Mohammed Alshoaibi, Ahmad Kamal Ariffin Mohd Ihsan

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A new finite element model has been developed to predict fatigue crack growth in arbitrary 2D geometries under constant amplitude loading. The purpose of this model is on the determination of 2D crack paths and surfaces as well as on the evaluation of components Lifetimes as a part of the damage tolerant assessment. Throughout the simulation of crack propagation an automatic adaptive mesh is carried out in the vicinity of the crack front nodes and in the elements which represent the higher stresses distribution. The fatigue crack direction and the corresponding stress-intensity factors are estimated at each small crack increment by employing the displacement correlation technique under facilitation of singular crack tip elements. The propagation is modeled by successive linear extensions, which are determined by the stress intensity factors under linear elastic fracture mechanics (LEFM) assumption. The stress intensity factors range history has to be recorded along the small crack increments. Upon completion of the stress intensity factors range history recording, fatigue crack propagation life of the examined specimen is predicted. Verification of the predicted fatigue life is validated with relevant experimental data and numerical results obtained by other researchers. The comparisons show that this model is capable of demonstrating the fatigue life prediction results as well as the fatigue crack path satisfactorily.

Original languageEnglish
Pages (from-to)209-215
Number of pages7
JournalInternational Review of Aerospace Engineering
Volume8
Issue number6
DOIs
Publication statusPublished - 2015

Fingerprint

Fatigue crack propagation
Stress intensity factors
Cracks
Fatigue of materials
Fracture mechanics
Crack tips
Stress concentration
Crack propagation
Geometry
Fatigue cracks

Keywords

  • Adaptive mesh
  • Fatigue life prediction
  • Finite element simulation
  • Mixed mode fracture
  • Stress intensity factors

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Aerospace Engineering
  • Control and Systems Engineering
  • Electrical and Electronic Engineering

Cite this

Finite element modeling of fatigue crack propagation using a self adaptive mesh strategy. / Alshoaibi, Abdulnaser Mohammed; Mohd Ihsan, Ahmad Kamal Ariffin.

In: International Review of Aerospace Engineering, Vol. 8, No. 6, 2015, p. 209-215.

Research output: Contribution to journalArticle

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