Journal of Northeastern University(Natural Science) ›› 2025, Vol. 46 ›› Issue (1): 76-82.DOI: 10.12068/j.issn.1005-3026.2025.20239038

• Mechanical Engineering • Previous Articles     Next Articles

Effects of Surface Periodic Roughness on Contact Stick-Slip Behaviors

Zhi-qiang WANG, Zhen-yu LEI   

  1. Institute of Rail Transit,Tongji University,Shanghai 201804,China. Corresponding author: LEI Zhen-yu,E-mail: zychux@126. com
  • Received:2023-07-19 Online:2025-01-15 Published:2025-03-25

Abstract:

In order to investigate the mechanism of surface periodic roughness on the stick‑slip characteristics of the contact interface, a three‑dimensional flexible‑body model of the slider‑plate contact was established by using the finite element method, and the contact stick‑slip motion processes under the surface smoothness and single/double surface roughness conditions were analyzed. The results indicated that during the velocity loading phase, the vibration form of the system is characterized by initial single stick‑slip vibration and subsequent sustained slip vibration under the surface smoothness condition. Under the single‑surface roughness condition, the unsteady periodic vibration occurs in the system, and the vibration manifests itself in the form of cyclic stick‑slip vibrations. Under the double‑surface roughness condition, influenced by the complex roughness of double contact surfaces, the vibration response of the system manifests the reciprocating and disorderly stick‑slip vibrations. Appropriate reduction of roughness amplitude and increase of roughness wavelength are beneficial to promote the rough surface contact.

Key words: periodic roughness, contact interface, stick?slip behavior, finite element method, vibration response

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