Elastic Buckling of Bionic Cylindrical Shells Based on Bamboo

被引：77

作者：

Ma, Jian-feng ^{[1
]}

Chen, Wu-yi ^{[1
]}

Zhao, Ling ^{[1
]}

Zhao, Da-hai ^{[2
]}

机构：

[1] Beijing Univ Aeronaut & Astronaut, Sch Mech Engn & Automat, Beijing 100083, Peoples R China

[2] Shenyang Aircraft Design Inst, Shenyang 110035, Peoples R China

来源：

JOURNAL OF BIONIC ENGINEERING | 2008年 / 5卷 / 03期

基金：

中国国家自然科学基金;

关键词：

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

D O I：

10.1016/S1672-6529(08)60029-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：231 / 238

页数：8

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