Finite element simulation of fatigue life estimation and crack path prediction of two-dimensional structures components

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

Research output: Contribution to journalArticle

Abstract

The main objective of this work is to analyse fatigue crack propagation of two-dimensional structures under constant amplitude loading using the developed adaptive mesh finite element. The finite element mesh is generated using the advancing front method. The adaptive remeshing process is carried out based on the posteriori stress error norm scheme. The stress intensity factors are estimated by employing the displacement extrapolation technique facilitated by construction of singular crack tip elements. The crack propagation is modelled by the splitting node approach and the trajectory follows the successive linear extensions of each crack increment. The propagation process is driven by linear elastic fracture mechanics approach, in the analysis, the resulted stress intensity factor range at each of crack increments is recorded. Fatigue life cycle can be predicted immediately after completion of the recording by integrating the generalised Paris' equation. The procedure is applied to the fatigue analysis of three different specimens namely modified compact tension, two internal non-colinear cracks specimen and PMMA beams specimen. Verification of the predicted fatigue life is conducted by comparing the results with the relevant experimental data and numerical results obtained by other researchers. The comparisons show that the developed programme is highly reliable in simulating fatigue crack propagation and predicting the fatigue life cycles.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalHKIE Transactions Hong Kong Institution of Engineers
Volume15
Issue number1
Publication statusPublished - 2008

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Fatigue of materials
Cracks
Fatigue crack propagation
Stress intensity factors
Life cycle
Extrapolation
Fracture mechanics
Crack tips
Crack propagation
Trajectories

Keywords

  • Adaptive mesh
  • Constant amplitude loading
  • Crack propagation
  • Fatigue life prediction
  • Finite elements
  • Stress intensity factor

ASJC Scopus subject areas

  • Engineering(all)

Cite this

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title = "Finite element simulation of fatigue life estimation and crack path prediction of two-dimensional structures components",
abstract = "The main objective of this work is to analyse fatigue crack propagation of two-dimensional structures under constant amplitude loading using the developed adaptive mesh finite element. The finite element mesh is generated using the advancing front method. The adaptive remeshing process is carried out based on the posteriori stress error norm scheme. The stress intensity factors are estimated by employing the displacement extrapolation technique facilitated by construction of singular crack tip elements. The crack propagation is modelled by the splitting node approach and the trajectory follows the successive linear extensions of each crack increment. The propagation process is driven by linear elastic fracture mechanics approach, in the analysis, the resulted stress intensity factor range at each of crack increments is recorded. Fatigue life cycle can be predicted immediately after completion of the recording by integrating the generalised Paris' equation. The procedure is applied to the fatigue analysis of three different specimens namely modified compact tension, two internal non-colinear cracks specimen and PMMA beams specimen. Verification of the predicted fatigue life is conducted by comparing the results with the relevant experimental data and numerical results obtained by other researchers. The comparisons show that the developed programme is highly reliable in simulating fatigue crack propagation and predicting the fatigue life cycles.",
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author = "Alshoaibi, {Abdulnaser M.} and Hadi, {M. S A} and {Mohd Ihsan}, {Ahmad Kamal Ariffin}",
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AU - Hadi, M. S A

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PY - 2008

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N2 - The main objective of this work is to analyse fatigue crack propagation of two-dimensional structures under constant amplitude loading using the developed adaptive mesh finite element. The finite element mesh is generated using the advancing front method. The adaptive remeshing process is carried out based on the posteriori stress error norm scheme. The stress intensity factors are estimated by employing the displacement extrapolation technique facilitated by construction of singular crack tip elements. The crack propagation is modelled by the splitting node approach and the trajectory follows the successive linear extensions of each crack increment. The propagation process is driven by linear elastic fracture mechanics approach, in the analysis, the resulted stress intensity factor range at each of crack increments is recorded. Fatigue life cycle can be predicted immediately after completion of the recording by integrating the generalised Paris' equation. The procedure is applied to the fatigue analysis of three different specimens namely modified compact tension, two internal non-colinear cracks specimen and PMMA beams specimen. Verification of the predicted fatigue life is conducted by comparing the results with the relevant experimental data and numerical results obtained by other researchers. The comparisons show that the developed programme is highly reliable in simulating fatigue crack propagation and predicting the fatigue life cycles.

AB - The main objective of this work is to analyse fatigue crack propagation of two-dimensional structures under constant amplitude loading using the developed adaptive mesh finite element. The finite element mesh is generated using the advancing front method. The adaptive remeshing process is carried out based on the posteriori stress error norm scheme. The stress intensity factors are estimated by employing the displacement extrapolation technique facilitated by construction of singular crack tip elements. The crack propagation is modelled by the splitting node approach and the trajectory follows the successive linear extensions of each crack increment. The propagation process is driven by linear elastic fracture mechanics approach, in the analysis, the resulted stress intensity factor range at each of crack increments is recorded. Fatigue life cycle can be predicted immediately after completion of the recording by integrating the generalised Paris' equation. The procedure is applied to the fatigue analysis of three different specimens namely modified compact tension, two internal non-colinear cracks specimen and PMMA beams specimen. Verification of the predicted fatigue life is conducted by comparing the results with the relevant experimental data and numerical results obtained by other researchers. The comparisons show that the developed programme is highly reliable in simulating fatigue crack propagation and predicting the fatigue life cycles.

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KW - Stress intensity factor

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