Table of Contents Author Guidelines Submit a Manuscript
Advances in Tribology
Volume 2016, Article ID 8181260, 10 pages
http://dx.doi.org/10.1155/2016/8181260
Research Article

A Factorial Design to Numerically Study the Effects of Brake Pad Properties on Friction and Wear Emissions

KTH Royal Institute of Technology, Machine Design, 100 44 Stockholm, Sweden

Received 29 August 2016; Revised 11 October 2016; Accepted 12 October 2016

Academic Editor: Meng Hua

Copyright © 2016 Jens Wahlström. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Airborne particulate emissions originating from the wear of pads and rotors of disc brakes contribute up to 50% of the total road emissions in Europe. The wear process that takes place on a mesoscopic length scale in the contact interfaces between the pads and rotors can be explained by the creation and destruction of contact plateaus. Due to this complex contact situation, it is hard to predict how changes in the wear and material parameters of the pad friction material will affect the friction and wear emissions. This paper reports on an investigation of the effect of different parameters of the pad friction material on the coefficient of friction and wear emissions. A full factorial design is developed using a simplified version of a previously developed cellular automaton approach to investigate the effect of four factors on the coefficient of friction and wear emission. The simulated result indicates that a stable third body, a high specific wear, and a relatively high amount of metal fibres yield a high and stable mean coefficient of friction, while a stable third body, a low specific wear, a stable resin, and a relatively high amount of metal fibres give low wear emissions.