Quasi-static response and multi-objective crashworthiness optimization of oblong tube under lateral loading |
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| Affiliation: | 1. School of Mechanical and Manufacturing Engineering, Dublin City University, Glasnevin, Dublin 9, Ireland;2. University of the West of Scotland, School of Engineering, High Street, Paisley PA1 2BE, UK;1. Laboratoire d’Ingénierie des Systèmes Mécaniques et des Matériaux (LISMMA), Supméca, 3, rue Fernand Hainaut, 93407 St Ouen Cedex, France;2. Université Mouloud MAMMERI, Laboratoire LMSE, Département de Génie-Mécanique, 15000 Tizi-Ouzou, Algérie;3. La Salle Passy-Buzenval, 50 avenue Otis Mygatt, 92500 Rueil-Malmaison, France;4. Université Paris 8, IUT de Tremblay, 93290 Tremblay-en-France, France;1. Department of Aerospace and Mechanical Engineering, Shiraz University of Technology, P.O. Box 71555-313, Shiraz, Iran;2. Mechanical Engineering Department, Faculty of Engineering, Yasouj University, P.O. Box 75914-353, Yasouj, Iran;1. School of Automotive Studies, Tongji University, Shanghai 201804, China;2. School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, NSW 2006, Australia;3. State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha 410082, China;1. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510641, China;2. School of Mechanical and Material Engineering, Wuzhou University, Wuzhou 543002, China;1. School of Mechanical and Manufacturing Engineering, Dublin City University, Glasnevin, Dublin 9, Ireland;2. School of Mechanical & Materials Engineering, University College Dublin, Dublin 4, Ireland;3. Institute of Engineering and Energy Technologies, School of Engineering, University of the West of Scotland, Paisley, PA1 2BE, United Kingdom;1. State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha 410082, China;2. Mechanical Engineering, Wayne State University, Detroit, MI 48202, USA;3. School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, NSW 2006, Australia |
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| Abstract: | This paper addresses the energy absorption responses and crashworthiness optimization of thin-walled oblong tubes under quasi-static lateral loading. The oblong tubes were experimentally compressed using three various forms of indenters named as the flat plate, cylindrical and a point load indenter. The oblong tubes were subjected to inclined and vertical constraints to increase the energy absorption capacity of these structures. The variation in responses due to these indenters and external constraints were demonstrated. Various indicators which describe the effectiveness of energy absorbing systems were used as a marker to compare the various systems. It was found that unconstrained oblong tube (FIU) exhibited an almost ideal response when a flat plate indenter was used. The design information for such oblong tubes as energy absorbers can be generated through performing parametric study. To this end, the response surface methodology (RSM) for the design of experiments (DOE) was employed along with finite element modeling (FEM) to explore the effects of geometrical parameters on the responses of oblong tubes and to construct models for the specific energy absorption capacity (SEA) and collapse load (F) as functions of geometrical parameters. The FE model of the oblong tube was constructed and experimentally calibrated. In addition, based on the developed models of the SEA and F, multi-objective optimization design (MOD) of the oblong tube system is carried out by adopting a desirability approach to achieve maximum SEA capacity and minimum F. It is found that the optimal design of FIU can be achieved if the tube diameter and tube width are set at their minimum limits and the maximum tube thickness is chosen. |
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| Keywords: | Oblong tubes Finite element method (FEM) Quasi-static Design of experiment (DOE) Response surfaces method (RSM) Multi-objective optimization design (MOD) |
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