Effect of temperature on the probability and cost analysis of mixed-mode fatigue crack propagation in patched aluminium plate |
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| Affiliation: | 1. Laboratoire Structures de Composites et Matériaux Innovants, Faculté de Génie Mécanique, Université des Sciences et de La Technologie D''Oran, BP 1505 El M''naouer, USTO, Oran, Algeria;2. ClermontUniversité, Université Blaise Pascal, InstitutPascal, BP10448, F-63000, Clermont-Ferrand, France;3. CNRS, UMR6602, Institut Pascal, F-63171, Aubière, France;1. Department of Structural Engineering, University of Calabria, Cosenza, Italy;2. Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Italy;1. Centre for Built Infrastructure Research (CBIR), School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW, Australia;2. Institute for Infrastructure Engineering, University of Western Sydney, Australia;1. Federal Center of Technological Education of Rio de Janeiro – CEFET/RJ, Av. Maracanã, 229, Rio de Janeiro, RJ, Brazil;2. Université de Nantes, Institut de Recherche en Génie Civil et Mécanique, Saint-Nazaire, France;1. Finnish Doctoral Program in Oral Sciences, Turku, Finland;2. Department of Restorative Dentistry and Cariology, Institute of Dentistry, University of Turku, Turku, Finland;3. Institute of Dentistry, University of Eastern Finland, Kuopio, Finland;4. Department of Oral and Maxillofacial Diseases, University of Helsinki, and Helsinki University Hospital, Helsinki, Finland;5. Research Unit of Oral Health Sciences and Medical Research Center Oulu (MRC Oulu), Oulu University Hospital and University of Oulu, Oulu, Finland;6. Turku University Hospital, TYKS, University of Turku, Turku, Finland;1. Key Laboratory of Coastal Disaster and Defence, Ministry of Education, Hohai University, Nanjing 210098, China;2. Department of Civil Engineering, University of Toronto, Toronto, Ontario M5S 1A4, Canada;3. Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China;4. Key Laboratory of Coastal Disaster and Defence, Ministry of Education, Hohai University, Nanjing 210098, China |
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| Abstract: | By the present paper, a numerical model for cost and probability analysis of mixed mode fatigue crack propagation in a patched 2024-T3Aluminium plate is developed. The finite element method is used to analyse the temperature effect on the bonded composite repair performance of the Aluminium plate. Using a fine mesh, mid-plane finite element results are in good experimental results given by literature. Different patch shapes are proposed like; circle, rectangle, square, ellipse, regular octagon, and prolonged octagon. The stress intensity factors at the crack tip are chosen as fracture criteria in order to estimate the repair performance. According to the temperature variation, the lifespan of the repaired fatigue crack growth is estimated using Paris law. The repair done on a central inclined crack with a single-side composite patch show that, best results are given by prolonged octagon and patch is damaged under at elevated temperature. The life-cycle of the patched Aluminium plate is obtained by Monte Carlo simulation, and the probability of failure is quantified according to various geometrical and mechanical parameters. At elevated temperature, the most dominant input parameters are thicknesses of adhesive and patch. In sensitivity analysis effect of thickness of the adhesive layer reaches 35%.Finally, a code source has been developed and implanted in ANSYS software, to consider the manufacturing process and optimal maintenance costs to prove the performance of patch operation from both safety and economical point of view. |
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| Keywords: | Mixed mode Fatigue Temperature effect Probability analysis Cost |
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