Fatigue life prediction of cracked attachment lugs using XFEM

•Stress intensity factor estimation in attachment lugs.•Extended finite element method to calculate SIF in attachment lugs.•Fatigue life estimation and crack growth in straight lugs. In the present paper, a three dimensional finite element method (FEM) is used to compute the stress intensity factor...

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Published in:International journal of fatigue 2015-08, Vol.77, p.186-193
Main Authors: Naderi, M., Iyyer, N.
Format: Article
Language:English
Subjects:
Attachment
Attachment lugs
Crack propagation
Extended finite element method
Fatigue life
Finite element method
Lugs
Mathematical analysis
Mathematical models
Stress intensity factor
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description •Stress intensity factor estimation in attachment lugs.•Extended finite element method to calculate SIF in attachment lugs.•Fatigue life estimation and crack growth in straight lugs. In the present paper, a three dimensional finite element method (FEM) is used to compute the stress intensity factor (SIF) in straight lugs of Aluminum 7075-T6. Extended finite element method (XFEM) capability available in ABAQUS is used to calculate the stress intensity factor. Crack growth and fatigue life of single through-thickness and single quarter elliptical corner cracks in attachment lug are estimated and then compared with the available experimental data for two different load ratios equal to 0.1 and 0.5. The SIF calculated from XFEM shows that the introduction of different loading boundary conditions significantly affect the estimated fatigue life.
doi_str_mv 10.1016/j.ijfatigue.2015.02.021
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subjects Attachment
Attachment lugs
Crack propagation
Extended finite element method
Fatigue life
Finite element method
Lugs
Mathematical analysis
Mathematical models
Stress intensity factor
title Fatigue life prediction of cracked attachment lugs using XFEM
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