Friction Measurements

Introduction

Friction is the resistance to sliding between 2 surfaces in contact when pressed together. Friction is often described with a single coefficient which is the sliding resistance force divided by the normal force pushing the 2 surfaces together. In general, friction can be a function of the materials that make up the surfaces, the normal pressure, temperature and the rate of sliding.

There are a few experiments that are particularly useful in characterizing friction. The experiments are outlined below.

Typical Plastic Experiments:

Related Info

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Sled Friction Test Data


Sled Style Friction Experiment

A friction sled test is used for low normal force and comparative tests.

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Friction Sled Experiment

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Friction Sled Experiment Mounted on a Tensile Tester


High Pressure Friction Experiment

A more elaborate axial torsion friction test is used for higher normal force tests.

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Axial Torsion Friction Experiment

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Axial Torsion Friction Experiment