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A finite element simulation and experimental validation of a composite bolted joint loaded in bending and torsion
Affiliation:1. Department of Mechanical Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy;2. Structural Analisys Department, Italdesign-Giugiaro S.p.A., Via A. Grandi 25, 10024 Moncalieri, Italy;1. Physics Department, Science College, Northern Borders University, Saudi Arabia;2. Physics Department, Science College, Al-Majmaah University, Al-Zulfi, Saudi Arabia;3. Department of Engineering Mathematics & Physics, Faculty of Engineering, Cairo University, Giza, Egypt;4. Arab Academy of Science and Technology, Al-Horria, Heliopolis, Cairo, Egypt;1. Faculty of Civil Engineering and Architecture, Department of Structural Engineering, Lublin University of Technology, Nadbystrzycka 40 str., 20-618 Lublin, Poland;2. Faculty of Civil Engineering and Architecture, Department of Solid Mechanics, Lublin University of Technology, Nadbystrzycka 40 str., 20-618 Lublin, Poland;1. Sinoma Science & Technology Co., Ltd., Nanjing, 210012, China;2. Composites Research Network-Okanagan Laboratory, School of Engineering, The University of British Columbia, Kelowna, V1V1V7, Canada;3. Advanced Fibrous Materials Laboratory, The University of British Columbia, Vancouver, V6T1Z4, Canada;1. National Center for Nanoscience and Technology, Beijing 100190, China;2. Beijing Aeronautical Science and Technology Research Institute, Beijing 102211, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;4. Wuhan University of Technology, School of Materials Science and Engineering, Wuhan 430070, China;1. Donetsk Institute for Physics and Engineering Named After A.A. Galkin, National Academy of Sciences of Ukraine, Kyiv, Ukraine;2. Department of Materials Science and Engineering, Monash University, Australia;3. Donetsk Institute for Physics and Engineering, NASU, Donetsk, Ukraine;4. Institute of Nanotechnology, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany;5. Karlsruhe Nano Micro Facility, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
Abstract:The paper describes the FE modelling and experimental validation of a composite bolted joint loaded in bending and torsion. The selected material is a hybrid glass-carbon non-woven fabric in epoxy matrix; the manufacturing technology is hand lay-up with vacuum bagging. Following a material characterization run on standard specimens, six joints were subjected to monotonic or cyclic loading, followed by monotonic loading until failure. Results show that components exhibit lower reduction in stiffness and strength due to cycling compared to standard specimens. Also, the ratio between the maximum load for which no stiffness or strength degradation was observed in 106 cycles and the static ultimate load were higher for components than for specimens. The modelling activity focuses on the simulation of the monotonic test. Numerical results show a good correlation with experiments in terms of material stiffness in the linear range and in predicting the regions of failure as highly stressed areas. However, being the analysis linear, a quantitative correlation between calculated stresses and ply strength properties was only found for the first ply failure.
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