Effect of roughness on stiction

7th AIC‐ICMR on Sciences and Engineering 2017

自然科学;工业技术

Fuadi, Zahrul^1 ; Zahouani, Hassan^2 ; Takagi, Toshiyuki^3 ; Miki, Hiroyuki^4

Mechanical Engineering Department, Syiah Kuala University, Jl. Tgk. Syech Abdurrauf No. 7, Darussalam Banda Aceh

23111, Indonesia^1

Laboratory of Tribology and System Dynamics Ecole Central de Lyon, Ecully Cedex

69311, France^2

Institute of Fluid Science, Tohoku University 2-1-1 Katahira, Aoba-ku Sendai

980-8577, Japan^3

Frontier Research Institute for Interdisciplinary Science, Tohoku University Aramaki-aza Aoba, Aoba-ku Sendai

980-8678, Japan^4

关键词: Friction force;    Kinetic coefficient of friction;    Metal surfaces;    Normal contact stiffness;    Silicon materials;    Static and kinetic friction coefficient;    Stick slip motion;    Visco-elastic material;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/352/1/012009/pdf
DOI  :  10.1088/1757-899X/352/1/012009

来源: IOP

【 摘 要 】

In this paper, the viscoelastic material was used to investigate the effect of roughness on stiction. The material is chosen because it is highly deformable so that contact during friction can be fully elastic. The soft surfaces were prepared by casting the silicon material on metal surfaces having smooth and unidirectional grooved texture. Two tests were conducted, indentation and friction, to find out the effect of roughness on parameters of normal contact stiffness, friction force and the difference between static and kinetic friction coefficient, μs-μk. As the results, it is found that all parameters are related to the surface roughness. Smoother surface tends to have a higher value of normal contact stiffness and higher value of friction force thus resulting in a larger difference between the static and kinetic coefficient of friction. Since the value of μs-μk is commonly related to the stick-slip motion, the smoother surface tends to have a larger propensity of stiction. It is shown by the result that the texture can reduce the stiction because it reduces the value of normal contact stiffness, resulting in a lower value of μs-μk.