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; H. Jang

doi:10.1007/s11249-015-0486-5

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, H. Jang

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

The friction and wear of brake friction materials containing phenolic resins with different weight average molecular masses (M_w = 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 M_w of the phenolic resin, attributed to the different shear strengths of the friction materials. The high-M_w 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-M_w 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 M_w did not change the surface stiffness after the friction tests, indicating that the improved friction-induced vibration of the friction material with the high-M_w phenolic resin was attributed to an increased matrix stiffness rather than to the sliding surface.

Original language	English
Article number	10
Journal	Tribology Letters
Volume	58
Issue number	1
DOIs	https://doi.org/10.1007/s11249-015-0486-5
Publication status	Published - 2015 Mar

Bibliographical note

Publisher Copyright:
© 2015 Springer Science+Business Media.

Keywords

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

ASJC Scopus subject areas

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

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

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.",

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AU - Kim, J. W.

AU - Joo, B. S.

AU - Jang, H.

PY - 2015/3

Y1 - 2015/3

N2 - 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.

AB - 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.

KW - Average molecular mass

KW - Brake/clutch materials

KW - Fade

KW - Phenolic resin

KW - Sliding wear

KW - Stick-slip

KW - Wear

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

Abstract

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Keywords

ASJC Scopus subject areas

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