Systematic Variation of Friction of Rods
Systematic Variation of Friction of Rods
复制标题
杆摩擦力的系统变化
DOI：
10.1115/1.4055544
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Khoda, Bashir
中科院分区：
文献类型：
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作者：
Ibrahim Khalil, Md;Tong, Dezhong;Wang, Guanjin;Khalid Jawed, Mohammad;Khoda, Bashir
在弹性杆中打结的机械响应强烈地依赖于由于杆-杆接触而产生的摩擦力。基于弹性杆的摩擦系数，结的行为可以在性质上不同。杆-杆接触过程中摩擦力的系统变化是任何实验设计的关键组成部分，以揭示结力学背后的潜在成分。在本文中，我们展示了一种新的方法来控制连续杆的摩擦，通过粘附非球形无机微粒。聚合物粘合剂用于将颗粒作为凹凸体递送到棒基底上，并且通过控制它们的尺寸和分布来确定棒的摩擦系数。同时，离散弹性杆算法的数值模拟被用来重现实验观察。进行桌面实验，其中拉紧具有各种解结数的上手结。这些实验的力-延伸曲线表明，所提出的过程可以成功地调整杆之间的摩擦。
The mechanical response of a knot tied in elastic rods strongly depends on the frictional force due to rod–rod contact. The behavior of a knot can be qualitatively different based on the frictional coefficient of the elastic rod. Systematic variation of friction during rod–rod contact is a crucial component of any experimental design to uncover the underlying ingredients behind the mechanics of knots. In this paper, we demonstrate a novel process of controlling the friction of a continuous rod by adhering non-spherical inorganic micro-particles. Polymeric binder is used to deliver the particles as asperities over the rod substrate and by controlling their size and distribution the coefficient of friction of the rod is determined. In parallel, numerical simulations with the discrete elastic rods algorithm are used to reproduce the experimental observations. Tabletop experiments are performed where overhand knots with a variety of unknotting numbers are pulled tight. The force–extension curve of these experiments shows that the proposed process can successfully tune the friction between rods.