Abstract
Shape evolution of a quarter-elliptical crack emanating from a hole is studied. Three dimensional elastic-plastic finite element analysis of the fatigue crack closure was considered and the stress intensity factor was calculated based on the duplicated elastic model at each crack tip node. The crack front node was advanced proportional to the imposed effective stress intensity factor. Remeshing was applied at each step of the crack growth and solution mapping algorithm was considered. Crack growth retardation at free surfaces was successfully observed. A MATLAB-ABAQUS interference code was developed for the first time to perform crack growth on the basis of crack closure. Simulation results indicated that crack shape is sensitive to the remeshing strategy. Predictions based on the proposed models were in good agreement with Carlson’s experiments results.
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Recommended by Associate Editor Youngseog Lee
M. H. Gozin earned his M.Sc. in mechanical engineering at Sharif University of technology in 2009. He is currently a Ph.D. student at K.N. Toosi University of Technology. His current interest is developing a model for considering effects of compressive residual stress on the fatigue life of structural materials.
M. Aghaie-Khafri earned his Ph.D. in materials engineering at Tehran University of Technology in 2001. He is currently an associate professor at K.N. Toosi University of Technology. His research interest is mechanical behavior of materials.
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Gozin, MH., Aghaie-Khafri, M. Quarter elliptical crack growth using three dimensional finite element method and crack closure technique. J Mech Sci Technol 28, 2141–2151 (2014). https://doi.org/10.1007/s12206-014-0503-x
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DOI: https://doi.org/10.1007/s12206-014-0503-x