Relationship between the real contact behavior and tribological characteristics of cotton fabric
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ISSN 2223-7690 CN 10-1237/TH
RESEARCH ARTICLE
Relationship between the real contact behavior and tribological characteristics of cotton fabric Rongxin CHEN 1, Jiaxin YE1, Wei ZHANG2, Jiang WEI1, Yan ZHANG1, Kun LIU1,* 1
Institute of Tribology, Hefei University of Technology, Hefei 230009, China
2
School of Mechanical & Automotive Engineering, Fujian University of Technology, Fuzhou 350118, China
Received: 08 November 2019 / Revised: 06 March 2020 / Accepted: 20 April 2020
© The author(s) 2020. Abstract: The tribological characteristics of cotton fibers play an important role in engineering and materials science, and real contact behavior is a significant aspect in the friction behavior of cotton fibers. In this study, the tribological characteristics of cotton fibers and their relationship with the real contact behavior are investigated through reciprocating linear tribotesting and real contact analysis. Results show that the friction coefficient decreases with a general increase in load or velocity, and the load and velocity exhibit a co-influence on the friction coefficient. The dynamic change in the real contact area is recorded clearly during the experiments and corresponds to the fluctuations observed in the friction coefficient. Moreover, the friction coefficient is positively correlated with the real contact area based on a quantitative analysis of the evolution of friction behavior and the real contact area at different loads and velocities. This correlation is evident at low velocities and medium load. Keywords: cotton fabric; real contact behavior; tribological characteristics; loading condition; velocity condition
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Introduction
Cotton fibers are the purest sources of cellulose, comprising more than 90% cellulose [1]. Compared with other fibers, cotton fibers are more widely used in engineering, materials science, and biology, particularly in applications such as composite fiber bearings and carbon fabric composite functional materials [2–4]. Cotton fibers are classified as viscoelastic materials, and exhibit complex mechanical behaviors. The tribological characteristics of cotton fibers are fundamental to their mechanical behavior, and are crucial for understanding their surface characteristics. The friction behavior reflects the ability of fibers to withstand shear motion, and is influenced by the structure of the fiber surface, loading type, and relative motion velocity [5]. Furthermore, understanding * Corresponding author: Kun LIU, E-mail: [email protected]
the macrofriction behavior of cotton fibers is an essential step in the realization of superior material properties, such as wear resistance, tear resistance, and lifespan [6]. Hence, understanding the tribological characteristics of cotton fibers is necessary to improve fiber processing technology and the performance of fiber products. The properties of cotton fibers have been investigated in previous studies, but its tribological properties are unknown and require exploration [79]. Several studies have explored the friction mechani
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