The Influence of Normal Load and Sliding Speed on Frictional Properties of Skin

• Published in: Journal of bionics engineering Vol. 5; no. 1; pp. 33 - 38
• Main Authors: Tang, Wei, Ge, Shi-rong, Zhu, Hua, Cao, Xi-chuan, Li, Ning
• Format: Journal Article
• Language: English
• Published: Singapore Elsevier Ltd 01.03.2008; Springer Singapore; Institute of Tribology and Reliability Engineering, School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, P. R. China; Blotribology Center of the State Key Laboratory of Tribology, China University of Mining and Technology,Xuzhou 221116,P.R.China%Institute of Tribology and Reliability Engineering, School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, P. R. China
• Subjects: Artificial Intelligence; Biochemical Engineering; Bioinformatics; Biomaterials; Biomedical Engineering and Bioengineering; Biomedical Engineering/Biotechnology; Engineering; friction coefficient; normal load; skin; sliding speed; 仿生学; 摩擦系数; 滑行速度; skin; normal load; friction coefficient; sliding speed
• ISSN: 1672-6529; 2543-2141
• DOI: 10.1016/S1672-6529(08)60004-9

The study of frictional properties of human skin is important for medical research, skin care products and textile exploi- tation. In order to investigate the influence of normal load and sliding speed on the frictional properties of skin and its possible mechanism, tests were carded out on a multi-specimen friction tester. When the normal load increases from 0.1 N to 0.9 N, normal displacement and the friction coefficient of skin increase. The friction coefficient is dependent on the load, indicating that both adhesion and deformation contribute to the friction behaviour. The deformation friction was interpreted using the plough model of friction. When sliding speed increases from 0.5 mm·s^-1 to 4 mm·s^-1, the friction coefficient increases and ＂stick-slip＂ phenomena increase, indicating that hysteretic friction contributes to the friction. The hysteretic friction was in- terpreted using schematic of energy translation during the rigid spherical probe sliding on the soft skin surface, which provides an explanation for the influence of the sliding speed on the frictional characteristics of the skin.