Investigation Of The Temperature Behaviour Of
Sliding Rubber Materials
Author(s)
O. Lahayne & J. Eberhardsteiner
Abstract
At the IMWS a testing device called Linear Friction Tester (LFT) was
developed, which is mainly used to characterise and quantify the friction
behaviour of tire materials under varying conditions. During the friction process
a considerable amount of heat is generated at the contact surface. Starting from
theoretical approaches, there is supposed to be a strong interrelation between the
friction coefficient ยต and the temperature T of the rubber. By means of
temperature sensors, FE-calculations and a model for the heat conduction it was
possible to measure and calculate the heating of the rubber with high accuracy.
In this paper some examples are presented for results of such measurements. A
model for the heat conduction is illustrated, and testing the correlation between
measurement and calculations validates the practicability of the model.
Keywords: Rubber, Temperature, Friction, Tire.
1 The testing device
In 1997 the Linear Friction Tester has been constructed [3]. The test conditions
at the LFT are well defined, since it is placed in an air-conditioned container, and
in good agreement with realistic breaking situations. The core of the device is a
linear drive that pulls a sledge with a rubber test specimen over the friction
surface. A pneumatic system applies the vertical load (up to 2000 N or 10 bar).
The test specimens have a size between 10 and 30 cm2 and contain different
arrangements of lamellae. The friction surfaces were cut out of real road
surfaces. Also friction tests on snow and ice surfaces can be performed. For
some experiments additionally a high-speed-camera recorded the deformation of
the sample.
Keywords
Rubber, Temperature, Friction, Tire.
Related Book
Other papers in this volume
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