Title: Hydroforming process of manufacturing for reverse spiral origami structure

Authors: Chenghai Kong; Xilu Zhao; Ichiro Hagiwara

Addresses: Department of Mechanical Engineering, Saitama Institute of Technology, 1690 Fusaiji, Fukaya 369-0293, Saitama, Japan ' Department of Mechanical Engineering, Saitama Institute of Technology, 1690 Fusaiji, Fukaya 369-0293, Saitama, Japan ' Meiji Institute for Advanced Study of Mathematical Sciences, Meiji University, 4-21-1, Nakano, Tokyo 101-8301, Japan

Abstract: The reverse spiral is an effective and representative origami structure that is able to effectively absorb energy in crash tests. Because of the irregular cross-section of the structure, it is manufactured by hydroforming; however, the process is complicated and its parameters are difficult to verify, so the fracture and excessive thinning problems of hydroforming have not yet been satisfactorily solved. To address these issues, a model was designed and the response surface method was applied to optimise the hydroforming processing parameters. By optimisation of the processing parameters, the maximum thinning rate of the optimised structure was decreased from 36.9% to 12.9% and the fracture and excessive thinning problems of hydroforming of reverse spiral origami structures have been solved.

Keywords: optimisation; reversed spiral origami structure; hydroforming; processing parameter.

DOI: 10.1504/IJVP.2017.086908

International Journal of Vehicle Performance, 2017 Vol.3 No.4, pp.347 - 364

Received: 11 Mar 2016
Accepted: 16 Jan 2017

Published online: 11 May 2017 *

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