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 language | English |
|---|---|
| Pages (from-to) | 1-6 |
| Number of pages | 6 |
| Journal | HKIE Transactions Hong Kong Institution of Engineers |
| Volume | 15 |
| Issue number | 1 |
| Publication status | Published - 2008 |
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Keywords
- Adaptive mesh
- Constant amplitude loading
- Crack propagation
- Fatigue life prediction
- Finite elements
- Stress intensity factor
ASJC Scopus subject areas
- Engineering(all)
Cite this
Finite element simulation of fatigue life estimation and crack path prediction of two-dimensional structures components. / Alshoaibi, Abdulnaser M.; Hadi, M. S A; Mohd Ihsan, Ahmad Kamal Ariffin.
In: HKIE Transactions Hong Kong Institution of Engineers, Vol. 15, No. 1, 2008, p. 1-6.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Finite element simulation of fatigue life estimation and crack path prediction of two-dimensional structures components
AU - Alshoaibi, Abdulnaser M.
AU - Hadi, M. S A
AU - Mohd Ihsan, Ahmad Kamal Ariffin
PY - 2008
Y1 - 2008
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.
KW - Adaptive mesh
KW - Constant amplitude loading
KW - Crack propagation
KW - Fatigue life prediction
KW - Finite elements
KW - Stress intensity factor
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UR - http://www.scopus.com/inward/citedby.url?scp=43149092431&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:43149092431
VL - 15
SP - 1
EP - 6
JO - Transactions Hong Kong Institution of Engineers
JF - Transactions Hong Kong Institution of Engineers
SN - 1023-697X
IS - 1
ER -