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Journal of Bionic Engineering

, Volume 5, Issue 3, pp 231–238 | Cite as

Elastic Buckling of Bionic Cylindrical Shells Based on Bamboo

  • Jian-feng MaEmail author
  • Wu-yi Chen
  • Ling Zhao
  • Da-hai Zhao
Article

Abstract

High load-bearing efficiency is one of the advantages of biological structures after the evolution of billions of years. Biomimicking from nature may offer the potential for lightweight design. In the viewpoint of mechanics properties, the culm of bamboo comprises of two types of cells and the number of the vascular bundles takes a gradient of distribution. A three-point bending test was carried out to measure the elastic modulus. Results show that the elastic modulus of bamboo decreases gradually from the periphery towards the centre. Based on the structural characteristics of bamboo, a bionic cylindrical structure was designed to mimic the gradient distribution of vascular bundles and parenchyma cells. The buckling resistance of the bionic structure was compared with that of a traditional shell of equal mass under axial pressure by finite element simulations. Results show that the load-bearing capacity of bionic shell is increased by 124.8%. The buckling mode of bionic structure is global buckling while that of the conventional shell is local buckling.

Keywords

bionic design bamboo culm thin-walled cylindrical structure buckling load-carrying efficiency 

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Copyright information

© Jilin University 2008

Authors and Affiliations

  • Jian-feng Ma
    • 1
    Email author
  • Wu-yi Chen
    • 1
  • Ling Zhao
    • 1
  • Da-hai Zhao
    • 2
  1. 1.School of Mechanical Engineering and AutomationBeijing University of Aeronautics and AstronauticsBeijingP. R. China
  2. 2.Shenyang Aircraft Design InstituteShenyangP. R. China

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