Organic friction materials for brake linings, namely brake pads are polymer matrix
composites usually containing numerous macroscopic as well as microscopic
constituents such as filamentary reinforcements, solid lubricants, abrasives and fillers.
Their main objective of the these composite system are that a constant and stable
coefficient of friction (COF) is provided irrespective of environmental conditions such
as pressure, sliding velocity, temperature, humidity etc. Brake pads performance
should be maintained over a wide range of stress conditions. Although the wear of the
brake pad is inevitable, it should be minimized as far as possible. While cast iron has
been the dominant material for brake discs, brake pad materials are constantly
evolving into more complex composites.
The main objectives of the present work is to characterize the physical and the
tribological behavior of four commercial braking pads material formulations. For all
compositions the studied factors are normal pressure and sliding speed, considering
one braking-test protocol designed with temperature and friction load data acquisition.
A double pad-on-disc tribological test configuration was used to determine tribological
properties of brake pad for heavy vehicles commercial. Three wear tests via increased
severity of rubbing conditions for a constant braking distance.The authors acknowledge Auto Travões Viseu-recondicionamento de Travões e
embraiagens Lda the support through the provision of the frictrion linning materials
presented in the study
