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Technical Briefs

Lightweight Design for Thin-Walled Cylindrical Shell Based on Action Mechanism of Bamboo Node

[+] Author and Article Information
Denghai Xing

e-mail: xingdenghai@126.com

Wuyi Chen

School of Mechanical Engineering and Automation,
Beihang University,
Xueyuan Road No.37,
Beijing 100191, China
e-mail: wychen@buaa.edu.cn

Dengjiang Xing

School of Electrical Engineering,
Xi'an Jiaotong University,
Xianningxi Road No. 28,
Xi'an 710049, China
e-mail: xingdengjiang@163.com

Tuo Yang

State Key Laboratory of Systematic
and Evolutionary Botany,
Institute of Botany,
Chinese Academy of Sciences,
Nanxincun No. 20,
Beijing 100093, China
e-mail: yangtuo@ibcas.ac.cn

Contributed by the Design Automation Committee of ASME for publication in the Journal of Mechanical Design. Manuscript received January 17, 2012; final manuscript received September 16, 2012; published online November 19, 2012. Assoc. Editor: Shinji Nishiwaki.

J. Mech. Des 135(1), 014501 (Nov 19, 2012) (6 pages) Paper No: MD-12-1060; doi: 10.1115/1.4007927 History: Received January 17, 2012; Revised September 16, 2012

Lightweight design is needed for many engineering structures, but conventional design methods cannot always meet requirements. Natural organisms have developed many types of structures with excellent properties and ingenious construction, and they can provide many new design ideas. In this paper, a thin-walled cylindrical shell, one of the most common structures, is designed to resist buckling based on the study of bionics. First, the structure and function of bamboo node are described, and a statistical analysis of internode length-to-diameter ratio in bamboo is performed to investigate structural characteristics of bamboo node. Then, through buckling analysis of three relevant experimental models, the action mechanism of bamboo node is investigated, and two rules for application of this structure in engineering are proposed. Finally, a bionic design method is introduced, and a lightweight design for a thin-walled cylindrical shell based on this method is presented. A comparison between the bionic shell and a conventional one shows that the weight was reduced by as much as 20.5%.

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References

Figures

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Fig. 1

The arrangement of microfibers in a bamboo node [30]

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Fig. 2

Statistical comparison of the length-to-diameter ratio for different bamboo species

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Fig. 3

Buckling load arrangement for a thin-walled cylindrical shell

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Fig. 4

Buckling modes of a thin-walled cylindrical shell

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Fig. 5

Design of model II

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Fig. 6

Design of model III

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