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Metal-silicate friction in ultrahigh vacuumResults of the analysis and experiments on the frictional behavior of materials under conditions of ultrahigh vacuum, as related to kinematic problems in a lunar environment, are presented. Experiments have been performed under varying conditions of cleanliness to determine frictional characteristics at 10 to the minus 7th power to 10 to the minus 8th power torr between flat basalt and spherical 7075-T6 aluminum surfaces. A quantitative analysis has been made of the factors influencing frictional behavior of these materials. The proposed mathematical model incorporated parameters of surface cleanliness, surface roughness, and surface energy.
Document ID
19720005761
Document Type
Other
Authors
Ofodile, E. I. (Du Pont de Nemours (E. I.) and Co. Wilmington, DE, United States)
Frisch, J. (Calif. Univ. Berkeley, United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1971
Publication Information
Publication: NASA. Goddard Space Flight Center 5th Aerospace Mech. Symp.
Subject Category
MACHINE ELEMENTS AND PROCESSES
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19720005742Analytic PrimaryFifth Aerospace Mechanisms SymposiumN72-13391 04-15Analytic Primary
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