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On-line Access: 2024-08-27

Received: 2023-10-17

Revision Accepted: 2024-05-08

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Journal of Zhejiang University SCIENCE A 2007 Vol.8 No.3 P.403-407

http://doi.org/10.1631/jzus.2007.A0403


Modeling of contact surface morphology and dust particles by using finite element method


Author(s):  WANG Dong, XU Liang-jun

Affiliation(s):  Research Lab of Electric Contacts, Beijing University of Post & Telecommunications, Beijing 100876, China

Corresponding email(s):   chanderwang@sina.com

Key Words:  Dust particles, Surface morphology, Finite element method (FEM), Hazardous size



Abstract: 
The effect of dust particles on electric contacts and a hazardous size range of hard dust particles using a rigid model were discussed before. As further research, elastic-plastic model of finite element analysis was established in this work, which is closer to real condition. In this work, the behavior of large size and small size particles, and the influence of particles hardness were investigated. The calculating result of small-size particles presents a general hazardous size coefficient for different contact surface morphology; for large-size particles, it presents a hazardous size coefficient for complicated composition of the dust. And the effect of the dust shape is also discussed.

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