School of Mechanical Engineering, Laboratory of Manufacturing Technology, National Technical University of Athens, Heroon Polytechniou 9, 15780, Athens, Greece.
Bioinspir Biomim. 2020 Sep 11;15(6). doi: 10.1088/1748-3190/ab983e.
The remarkable tribological attributes of the gecko feet have grown much interest in the field of biomimetic tribology over the past two decades. It has been shown that the complexity of friction and adhesion phenomena made it difficult to transfer these exceptional properties into fully functional smart, dry, micro patterned adhesives. The latter, combined with the relative lack of literature on computational oriented studies on these phenomena, is the motive of the current work. Here, a 2D time-dependent finite element model of friction and adhesion attributed contact of polydimethysiloxane (PDMS) micro flaps with a smooth SiOspherical surface is presented. The model is tested through simulations concerning changes in the disc curvature, the flap density, as well as different disc mounting heights, representing the effect of preload. Furthermore, the effect of tribological parameters of adhesion and friction coefficient is discussed. Finally, the effect of the use of two hyperelastic material models was examined.
在过去的二十年中，壁虎脚的显著摩擦学特性引起了仿生摩擦学领域的极大兴趣。已经表明，摩擦和粘附现象的复杂性使得难以将这些特殊性能转化为完全功能的智能、干燥、微图案化的粘合剂。后者，再加上关于这些现象的计算导向研究的相对缺乏文献，是当前工作的动机。在这里，提出了一种与光滑 SiO 球形表面接触的聚二甲基硅氧烷 (PDMS) 微翼片的摩擦和粘附特性相关的二维时变有限元模型。该模型通过模拟圆盘曲率、翼片密度以及不同的圆盘安装高度（代表预载的影响）的变化来进行测试。此外，还讨论了粘附和摩擦系数的摩擦学参数的影响。最后，还检验了使用两种超弹性材料模型的效果。
