Fatigue life and crack path prediction in 2D structural components using an adaptive finite element strategy

Abdulnaser M. Alshoaibi, Ahmad Kamal Ariffin Mohd Ihsan

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Fatigue crack propagation in two-dimensional structural components under constant amplitude loading is analyzed using an adaptive finite element procedure. The stress-intensity factors are estimated by using displacement correlation technique utilizing the purposely constructed singular elements around the crack tip with automatic remeshing algorithms. The propagation is modeled by the successive linear extensions under the linear elastic assumption. Subsequently, the fatigue life cycle is estimated based upon Paris' equation. The test for the first specimen which is the single centered angled crack is applied only to show the accuracy and efficiency of this method to calculate accurate values of stress intensity factors. Subsequently, fatigue analysis is applied for two geometry specimens namely, single edge angled crack and modified four points bending SEN specimen. Verification of the predicted fatigue life is validated with relevant experimental data and numerical results obtained by other researchers. The comparisons show that the program is capable of demonstrating the fatigue life prediction results as well as the fatigue crack path satisfactorily.

Original languageEnglish
Pages (from-to)97-104
Number of pages8
JournalInternational Journal of Mechanical and Materials Engineering
Volume3
Issue number1
Publication statusPublished - 2008

Fingerprint

Fatigue of materials
Stress intensity factors
Cracks
Fatigue crack propagation
Crack tips
Life cycle
Geometry
Fatigue cracks

Keywords

  • Adaptive mesh
  • Constant amplitude loading
  • Crack propagation
  • Fatigue
  • Finite elements
  • Stress intensity factors

ASJC Scopus subject areas

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

Cite this

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abstract = "Fatigue crack propagation in two-dimensional structural components under constant amplitude loading is analyzed using an adaptive finite element procedure. The stress-intensity factors are estimated by using displacement correlation technique utilizing the purposely constructed singular elements around the crack tip with automatic remeshing algorithms. The propagation is modeled by the successive linear extensions under the linear elastic assumption. Subsequently, the fatigue life cycle is estimated based upon Paris' equation. The test for the first specimen which is the single centered angled crack is applied only to show the accuracy and efficiency of this method to calculate accurate values of stress intensity factors. Subsequently, fatigue analysis is applied for two geometry specimens namely, single edge angled crack and modified four points bending SEN specimen. Verification of the predicted fatigue life is validated with relevant experimental data and numerical results obtained by other researchers. The comparisons show that the program is capable of demonstrating the fatigue life prediction results as well as the fatigue crack path satisfactorily.",
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AU - Alshoaibi, Abdulnaser M.

AU - Mohd Ihsan, Ahmad Kamal Ariffin

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N2 - Fatigue crack propagation in two-dimensional structural components under constant amplitude loading is analyzed using an adaptive finite element procedure. The stress-intensity factors are estimated by using displacement correlation technique utilizing the purposely constructed singular elements around the crack tip with automatic remeshing algorithms. The propagation is modeled by the successive linear extensions under the linear elastic assumption. Subsequently, the fatigue life cycle is estimated based upon Paris' equation. The test for the first specimen which is the single centered angled crack is applied only to show the accuracy and efficiency of this method to calculate accurate values of stress intensity factors. Subsequently, fatigue analysis is applied for two geometry specimens namely, single edge angled crack and modified four points bending SEN specimen. Verification of the predicted fatigue life is validated with relevant experimental data and numerical results obtained by other researchers. The comparisons show that the program is capable of demonstrating the fatigue life prediction results as well as the fatigue crack path satisfactorily.

AB - Fatigue crack propagation in two-dimensional structural components under constant amplitude loading is analyzed using an adaptive finite element procedure. The stress-intensity factors are estimated by using displacement correlation technique utilizing the purposely constructed singular elements around the crack tip with automatic remeshing algorithms. The propagation is modeled by the successive linear extensions under the linear elastic assumption. Subsequently, the fatigue life cycle is estimated based upon Paris' equation. The test for the first specimen which is the single centered angled crack is applied only to show the accuracy and efficiency of this method to calculate accurate values of stress intensity factors. Subsequently, fatigue analysis is applied for two geometry specimens namely, single edge angled crack and modified four points bending SEN specimen. Verification of the predicted fatigue life is validated with relevant experimental data and numerical results obtained by other researchers. The comparisons show that the program is capable of demonstrating the fatigue life prediction results as well as the fatigue crack path satisfactorily.

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