Thin-walled structures as impact energy absorbers |
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| Affiliation: | 1. Centre for Structures, Assembly and Intelligent Automation, Cranfield University, MK43 0AL, UK;2. Cranfield Impact Centre (CIC), Cranfield University, MK43 0AL, UK;1. School of Traffic & Transportation Engineering, Central South University, Changsha, Hunan, China;2. Key Laboratory of Traffic Safety on Track, Ministry of Education, Changsha, Hunan, China;3. Joint International Research Laboratory of Key Technology for Rail Traffic Safety, Changsha, Hunan, China;4. National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle, Changsha, Hunan, China;5. CRRC Qingdao Sifang co., Ltd., China;1. Centre for Innovative Structures and Materials, School of Engineering, RMIT University, GPO Box 2476, Melbourne, Vic. 3001, Australia;2. XIE Archi-Structure Design (Shanghai) Co., Ltd., Shanghai 200433, China |
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| Abstract: | The key structural components of the majority of transportation vehicles are designed as thin-walled components. During a crash event, a number of structural components must sustain abnormal loadings in order to meet stringent integrity requirements. At the same time other components must dissipate impact energy in a controlled manner that limits the deceleration of a vehicle to a required safety limit. The present paper focuses on the crushing mechanics of thin-walled components. The analysis method is based on the Superfolding Element (SE) concept, which originates from experimentally observed folding patterns of crushed shell elements. The paper presents milestones of the underlying theory of plastic shells and basic design considerations that are coupled with the SE-based predictive techniques in a CAE software. The paper also presents basic examples of the design process of typical energy absorbing components. |
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