Effect of surface contact conditions on the stick-slip behavior of brake friction material

S. W. Yoon, M. W. Shin, W. G. Lee, H. Jang

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Brake-induced stick-slip, which determines the propensity of a brake system to generate noise, was investigated by analyzing the friction oscillation at different loads, speeds, and surface topographies. The friction characteristics at the sliding interface were obtained using a pad-on-disk type tribometer and a 1/5-scale brake dynamometer. Results showed that the size and stiffness of the surface contact plateaus significantly affect the propensity of stick-slip and wear. The stick-slip amplitude increased with normal load and decreased with sliding speed. Contact stiffness of the friction material, which was modified by producing shallow slots on the rubbing surface, also strongly affected the stick-slip propensity, whereas Δμ(=μ sk) was not changed by the surface modification. The strong effects from the contact stiffness suggest that the height distribution of the surface plateaus can change the stick-slip propensity of a brake friction material.

Original languageEnglish
Pages (from-to)305-312
Number of pages8
JournalWear
Volume294-295
DOIs
Publication statusPublished - 2012 Jul 30

Keywords

  • Brake material
  • Brakes
  • Sliding wear
  • Stick-slip
  • Surface topography

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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