Modeling 3D sliding electrical contact considering fully coupled thermal-mechanical-electrical effects. (June 2023)

• Record Type: Journal Article
• Authors: Sui, Yijin; Wang, Wenzhong; Zhang, Haibo; Xie, Youjin
• Is Part Of: Tribology international. Volume 184(2023)
• Publication Date: 2023-06
• Subjects: Sliding electrical contact -- Thermal-mechanical-electrical coupling -- Electrical constriction resistance -- Electric potential equilibrium; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2023.108491
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: The 3D sliding electrical contact model considering thermal-mechanical-electrical coupling is presented in this paper. The semi-analytical method (SAM) is used to solve this complex multi-physical contact model. Firstly, the frequency response functions (FRFs) for thermal-mechanical-electrical fields are derived. Then, with discrete convolution and fast Fourier transform (DC-FFT) speeding calculation, a solving procedure, including the conjugate gradient method for force balance and algorithms for electrical potential equilibrium and heat flux partition, is proposed for the first time to solve the fully coupled electrical contact problem. Last, the effects of multiple loadings including the current, normal force, and sliding velocity on electrical contact behaviors are systematically investigated. Highlights: The multi-physical fields coupled model for sliding electrical contact is proposed. An electrical potential equilibrium algorithm is proposed to predict the ECR. As current increases, the electrical effect is firstly negligible and then soars. Moderately increasing normal force can reduce the stress and temperature rise.