Experimental and simulation study of the dynamic characteristics of friction force under third-body intrusion behaviour. (1st April 2022)

• Record Type: Journal Article
• Authors: Yan, Xiaoyu; Fan, Chenglong; Wang, Wei; Liu, Xiaojun; Chen, Bingsan
• Is Part Of: Mechanical systems and signal processing. Volume 168(2022)
• Publication Date: 2022-04-01
• Subjects: Third-body -- Cellular automata -- Multi-contact model -- Spring–block structure; Structural dynamics -- Periodicals; Vibration -- Periodicals; Constructions -- Dynamique -- Périodiques; Vibration -- Périodiques; Structural dynamics; Vibration; Periodicals; 621
• DOI: 10.1016/j.ymssp.2021.108726
• Languages: English
• ISSNs: 0888-3270

Abstract

Highlights: A dynamic model of a spring-block-sliding belt structure is established based on cellular automata and multi-contact model. The friction force–velocity correlation under third-body intrusion is studied both in experiment and simulation. The experimental validation reveals that the proposed model has a certain reliability. It is found that the change of ratio of particle size to interface size may alter the mode of stick–slip significantly. Abstract: Although the noise and wear of frictional pairs in third-body behaviour have been widely researched, the dynamic characteristics of the frictional force under third-body intrusion behaviour are seldom studied. In this study, a spring–block structure driven by a conveyor belt with third-body particles is established. The results indicate that the interference of third-body particles changes the positive correlation between the frictional force and velocity to a negative correlation. A multi-contact frictional model is established using a cellular automata modelling approach to estimate the distribution of particles. The results reveal that this model can effectively predict the negative correlation under particle intrusion. This correlation may be attributed to the decrease in the third-body particle number with velocity. SiO2 third-body intrusion complicates the frequency characteristics; however, the intrusion of PVC particles lead to a smaller amplitude of the frictional force. Altering the size of the interface has a certain effect on the fluctuation mode of stick–slip under an extremely small surfaces separation.