Experimental Characterization of Micro-Friction on a Mica Surface Using the Lateral Motion and Force Measurement Capability of an Instrumented Indenter |
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Authors: | Abhishek Srivastava Karl J Astrom Kimberly L Turner |
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Affiliation: | (1) Department of Mechanical and Environmental Engineering, University of California, Santa Barbara, CA 93106, USA |
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Abstract: | An experimental characterization of friction forces between asymmetric surfaces in the micro-regime is presented. The lateral
motion and force-measurement capability of an instrumented indenter (triboindenter) is characterized and explored for determining
friction properties at low velocities. Friction experiments are performed using the triboindenter with high repeatability.
It is observed that real-time depth measurements closely follow the Hertzian prediction. Friction spikes with magnitudes depending
on the drive velocity input are observed with peak friction force increasing with the dwell time. Anisotropy is observed between
surfaces of different materials with stick-slip occurring only at specific relative orientations. Directions for expanding
the current range of the triboindenter to obtain data from the nano to the macro scale are also presented. |
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Keywords: | Adhesion Stiction Static friction Stick-slip Unlubricated friction Friction test methods Aluminum Diamond |
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