Fatigue behaviour and life prediction of filament wound CFRP pipes based on coupon tests |
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| Institution: | 1. School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China;2. Department of Mechanical Engineering, Politecnico di Milano, 20156 Milan, Italy;3. INEGI, Faculty of Engineering, University of Porto, Porto 4200-465, Portugal;4. Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway;1. Necmettin Erbakan University, Faculty of Aeronautics and Astronautics, Dept. of Aeronautical Engineering, 42090, Meram, Konya, Turkey;2. The Graduate School of Natural and Applied Science of Selçuk University, Dept. of Metallurgical and Materials Engineering, Konya, Turkey;1. Necmettin Erbakan University, Seydişehir Vocational High School, Konya, Turkey;2. Selçuk University, Engineering Faculty, Department of Mechanical Engineering, Konya, Turkey;3. Necmettin Erbakan University, Faculty of Aeronautical and Space Sciences, Konya, Turkey |
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| Abstract: | This paper investigates the fatigue behaviour of filament wound Toray T700/Epotech X4201 composite pipes with different lay-ups. The present work compares the fatigue behaviour of coupon specimens manufactured with two different fiber orientations under tension-tension and tension-compression cyclic actions. The test results show that the lay-up and stress ratio have significant effect on the failure mechanism and fatigue life of carbon fiber reinforced polymer (CFRP) composite coupons. This paper develops an empirical model, which integrates the effect of stress ratio in a fatigue damage parameter, to evaluate the fatigue life of the CFRP filament wound coupons. Combined with the numerically calculated stresses at the critical locations corresponding to the fatigue damage locations, the proposed empirical model developed from the coupon test database predicts successfully the fatigue life of full diameter CFRP pipes, using stresses computed at critical locations in the CFRP pipe. |
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| Keywords: | CFRP Fatigue behaviour Composite riser Delamination Fatigue life Filament wound |
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