壁虎粘附微观力学机制的仿生研究进展

陈少华; 彭志龙

doi:10.6052/1000-0992/11-138

壁虎粘附微观力学机制的仿生研究进展

doi: 10.6052/1000-0992/11-138

陈少华^,,
彭志龙

中国科学院力学研究所非线性力学国家重点实验室, 北京 100190

基金项目: 国家自然科学基金项目(10972220, 10732050, 11125211) 资助

详细信息

通讯作者:
陈少华

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- 被引次数: 0
出版历程
- 收稿日期: 2011-10-08
- 修回日期: 2011-11-11
- 刊出日期: 2012-05-25

PROGRESS IN THE BIONIC STUDY ON GECKO'S MICRO-ADHESION MECHANISM

CHEN Shaohua^,,
PENG Zhilong

LNM, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China

Funds: The project was supported by the National Natural Science Foundation of China (10972220,10732050, 11125211).

More Information

Corresponding author: CHEN Shaohua

摘要

摘要: 本文针对壁虎粘附系统最小单元的真实形状, 类似于有限尺寸纳米薄膜的铲状纤维, 综述了对其微观粘附力学机制主要影响因素的多个研究, 主要考虑了有限尺寸纳米薄膜长度、厚度、撕脱角等对撕脱力的影响; 物体表面粗糙度以及环境湿度等对粘附的影响因素; 包括实验、理论及数值模拟的研究及结果比较. 最后给出仿生粘附力学方向仍然存在的主要科学问题及进一步的研究展望.
- 壁虎 /
- 铲状纤维 /
- 微观粘附机制 /
- 仿生 /
- 有限尺寸纳米薄膜
Abstract: A class of animals possesses special climbing abilities in nature, which attracts enormous academic interests. To investigate the macro- and micro-mechanisms of such animals’ adhesion can not only develop relevant surface/interface mechanics, but also provide novel ideas for the design of advanced adhesive materials and appropriate adhesive system for a micro-climbing robot, and shed lights on solving methods for adhesive failure problems in MEMS/NEMS and AFM. Experiments have found that the adhesive system on gecko’s foot is hierarchical, which will produce strong adhesion. There are millions of setae on a gecko’s foot and each seta will branch into hundreds of spatulae. The spatula is the smallest adhesive structure in a gecko’s foot, which is about 200nm in width and length, about 5nm in thickness. The adhesive behavior of a spatula on a surface looks like that of a finite-sized nano-film. The basic principle of the adhesion is due to Van Der Waals force between two surfaces. Plenty of spatulae will cause the adhesion force large enough to support the weight of a gecko. In the present paper, considering the real shape of the smallest adhesive structure, which is similar to a nano-film with a finite length, we present an overview of the main influence factors of the micro-adhesion mechanism of gecko’s spatula, including the effects of adhesion length, thickness and peeling angles of a finite nano-film on the adhesion force, the effects of surface roughness and environmental humidity on surface/interface adhesion. Experimental investigations as well as theoretical and numerical studies are also reviewed. Finally, possible challenges and future development of the biomimetic adhesive mechanics are proposed and prospected.
- gecko /
- spatula /
- micro-mechanism of adhesion /
- biomimetic /
- nano-film with finite size

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