The effect of aspect ratio on adhesion and stiffness for soft elastic fibres

被引：41
作者：
Aksak, Burak [1 ]
Hui, Chung-Yuen [2 ]
Sitti, Metin [1 ]
机构：
[1] Carnegie Mellon Univ, Dept Mech Engn, Pittsburgh, PA 15213 USA
[2] Cornell Univ, Dept Theoret & Appl Mech, Ithaca, NY 14853 USA
来源：
JOURNAL OF THE ROYAL SOCIETY INTERFACE | 2011年 / 8卷 / 61期
基金：
美国国家科学基金会;
关键词：
elastomer; fibrillar adhesion; fibre stiffness; aspect ratio; CONTACT SHAPE; DRY; SURFACE; STRENGTH; MICRO;
D O I：
10.1098/rsif.2010.0582
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The effect of aspect ratio on the pull-off stress and stiffness of soft elastic fibres is studied using elasticity and numerical analysis. The adhesive interface between a soft fibre and a smooth rigid surface is modelled using the Dugdale-Barenblatt model. Numerical simulations show that, while pull-off stress increases with decreasing aspect ratio, fibres get stiffer. Also, for sufficiently low aspect ratio fibres, failure occurs via the growth of internal cracks and pull-off stress approaches the intrinsic adhesive strength. Experiments carried out with various aspect ratio polyurethane elastomer fibres are consistent with the numerical simulations.
引用
收藏
页码：1166 / 1175
页数：10
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