著者

趙 希禄 胡 亜波 萩原 一郎

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 A編 (ISSN:03875008)

巻号頁・発行日

vol.76, no.761, pp.10-17, 2010

参考文献数

11

被引用文献数

2 11

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During car frontal crash, crash energy is absorbed by the parts of front bumper, front side member, front panel member and so on. Previous research has indicated that front side member plays major role in energy absorption. For protecting the passengers, the front side member is expected to absorb crash energy as much as possible. In this study, we adopt cylindrical thin-walled structure using origami engineering as front side member instead of structure with box-shaped cross section which is generally used. We develop an optimization system of the cylindrical thin-walled structure using origami engineering, in which the objective function is to maximize the energy absorption of origami structure; the design variables are structural parameter, number of divisional sections along axis, number of edges of polygonal cross section and number of subdivision levels; the mass and initial peak load of optimal structure must be less than those of structure with box-shaped cross section. We then discuss the optimization results that the optimal structure is capable of absorbing energy 91% more than that of original box-shaped cross sectional structure which is usually bended on the way of being crashed, 37% more than that of original structure which is ideally crashed to bottom without bending.

著者

胡 亜波 趙 希禄 萩原 一郎

出版者

一般社団法人日本機械学会

雑誌

Dynamics & Design Conference

巻号頁・発行日

vol.2009, pp."531-1"-"531-5", 2009-08-03

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In recent years, the structures which used origami engineering attract much attention. It can be applied in many fields, such as automobile, building, medical care and so on. In this paper, it is focused on the reversed spiral cylindrical (RSC) origami structure, which is designed by Nojima. This structure is expected to use in side member and beverage containers. An automatic crashworthiness analysis system is developed to generalize different types of RSC origami structures which can transform RSC origami structures from polygon thin wall structures with a group of parameters automatically.

著者

趙 希禄 胡 亜波 萩原 一郎

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. A編 (ISSN:03875008)

巻号頁・発行日

vol.76, no.769, pp.1131-1138, 2010-09-25

参考文献数

8

被引用文献数

1

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As regard to car frontal crash, previous researches have indicated that the front side member plays a major role in energy absorption. For protecting the passengers, the front side member is expected to absorb crash energy as much as possible. In this study, we investigated the crash characteristics of half cut type side member structure by optimal design method to improve energy absorption ability. We developed an automatic optimal design system, in which the analysis meshes are generated with a group of design parameters and shape optimization is carried out automatically, The design variables are side member cross section shape, spot welding pitch length, divisional section numbers and radius difference along the axial direction, and the number of subdivision levels. As the result, the optimal side member structure with half cut type is capable of absorbing 1.44 times (1.29 times per unit mass) more energy than the original rectangular cross sectional side member structure with half cut type which is generally used.