Ultra-efficient wound composite truss structures |
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| Affiliation: | 1. Department of Aerospace Engineering, University of Bristol, Bristol BS8 1TR, UK;2. College of Engineering, Swansea University, Swansea SA1 8EN, UK;1. Karlsruhe Institute of Technology (KIT), Institute of Vehicle System Technology, Karlsruhe, Germany;2. Natural and Medical Sciences Institute (NMI), Reutlingen, Germany;3. German Aerospace Center (DLR), Institute of Vehicle Concepts, Stuttgart, Germany;1. College of Field Engineering, Army Engineering University of PLA, Nanjing 210007, China;2. College of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 211816, China;1. School of Materials Science & Engineering, Beihang University, Beijing 100191, China;2. School of Transportation Science & Engineering, Beihang University, Beijing 100191, China;3. Advanced Vehicle Research Center, Beihang University, Beijing 100191, China;4. International Research Centre for Advanced Structural & Biomaterials, Beihang University, Beijing 100191, China;5. Department of Materials Science & Engineering, University of California, Berkeley, CA 94720, USA;1. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. Aerospace System Engineering Shanghai, Shanghai 201108, China;3. China Academy of Launch Vehicle Technology, Beijing 100076, China;4. College of Engineering, Peking University, Beijing 100871, China |
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| Abstract: | This paper presents the design, analysis, manufacturing, experimental testing, and multiobjective optimization of a new family of ultra-efficient composite truss structures. The continuously wound truss concept introduced here is a versatile, low cost and scalable method of manufacturing truss structures based on a simple winding process. A prototype truss configuration is shown and experimentally characterized under torsion and three point bending loads. A large deformation implementation of the direct stiffness method is shown to provide good prediction of the stiffness properties of the prototype truss. This model is extended to include strength prediction with multiple failure modes. The design space achievable with these truss structures is then explored through multiobjective optimization using the NSGA II genetic algorithm. These continuously wound truss structures have the potential to provide between one and two orders of magnitude increase in structural efficiency compared to existing carbon fiber composite tubes. |
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| Keywords: | Filament winding Numerical analysis Mechanical testing Mechanical properties |
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