Wear and Friction-Induced Vibration of Brake Friction Materials with Different Weight Average Molar Mass Phenolic Resins

M. W. Shin, J. W. Kim, B. S. Joo, Ho Jang

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The friction and wear of brake friction materials containing phenolic resins with different weight average molecular masses (Mw = 2.2-6.1 kg/mol) were investigated using a Krauss-type tribometer and a reduced-scale dynamometer. The results demonstrated that the friction level, wear rate, and friction instability were strongly affected by the Mw of the phenolic resin, attributed to the different shear strengths of the friction materials. The high-Mw phenolic resin exhibited an increased friction level while reducing the wear rate, with both effects more pronounced at temperatures above the phenolic resin decomposition temperature. The friction materials containing the higher-Mw phenolic resins also showed an improved friction instability, revealing a lower critical velocity for the incidence of friction oscillation. The stiffness measured from the friction material revealed that the Mw did not change the surface stiffness after the friction tests, indicating that the improved friction-induced vibration of the friction material with the high-Mw phenolic resin was attributed to an increased matrix stiffness rather than to the sliding surface.

Original languageEnglish
Article number10
JournalTribology Letters
Volume58
Issue number1
DOIs
Publication statusPublished - 2015

Fingerprint

phenolic resins
Friction materials
brakes
Phenolic resins
Molar mass
Brakes
friction
Wear of materials
Friction
vibration
Stiffness
phenol-formaldehyde resin
Dynamometers
Molecular mass
Stiffness matrix
stiffness
Shear strength
dynamometers
stiffness matrix
tribometers

Keywords

  • Average molecular mass
  • Brake/clutch materials
  • Fade
  • Phenolic resin
  • Sliding wear
  • Stick-slip
  • Wear

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Wear and Friction-Induced Vibration of Brake Friction Materials with Different Weight Average Molar Mass Phenolic Resins. / Shin, M. W.; Kim, J. W.; Joo, B. S.; Jang, Ho.

In: Tribology Letters, Vol. 58, No. 1, 10, 2015.

Research output: Contribution to journalArticle

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