Microasperity model for elastohydrodynamic lubrication of a spinning ball on a flat surface

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086 0 ⊔ ‡aNAS 1.14:D-6009
088 ⊔ ⊔ ‡aNASA-TN-D-6009
100 1 ⊔ ‡aAllen, Charles W.
245 1 0 ‡aMicroasperity model for elastohydrodynamic lubrication of a spinning ball on a flat surface ‡h[electronic resource] / ‡cCharles W. Allen and Erwin V. Zaretsky.
246 3 ⊔ ‡aNASA TN D-6009
260 ⊔ ⊔ ‡aWashington, D.C. : ‡bNational Aeronautics and Space Administration : ‡b[For sale by the Clearinghouse for Federal Scientific and Technical Information, Springfield, Virginia 22151], ‡c1970.
300 ⊔ ⊔ ‡a19 p. : ‡bill. ; ‡c27 cm.
490 ⊔ 0 ‡aNASA technical note ; ‡vD-6009
504 ⊔ ⊔ ‡aIncludes bibliographical references (p. 18-19).
520 ⊔ ⊔ ‡aA microasperity elastohydrodynamic (EHD) model was developed for a ball spinning without rolling on a f l a t surface. The theory was developed by using a sinusoidal surface model in conjunction with existing dry- contact deformation theory and point-contact elastohydrodynamic theory for the microasperities. The computed torques based on this model were compared with experimental torques using the NASA spinning torque apparatus. Fair agreement was obtained between theoretical and experimental results below 300 000 psi maximum Hertz stress. Based on the model presented herein microasperity EHD lubrication does not appear to be a primary force in maintaining separation between the opposing surfaces.
538 ⊔ ⊔ ‡aMode of access: Internet.
538 ⊔ ⊔ ‡aSystem requirements: Adobe Acrobat Reader.
538 ⊔ ⊔ ‡aMode of access: World Wide Web.
650 ⊔ 0 ‡aSurface roughness.
650 ⊔ 0 ‡aHydrodynamics.
650 ⊔ 0 ‡aLubrication and lubricants.
650 ⊔ 0 ‡aHydroelasticity.
700 1 ⊔ ‡aZaretsky, Erwin V.
710 2 ⊔ ‡aLewis Research Center.
710 1 ⊔ ‡aUnited States. ‡bNational Aeronautics and Space Administration.
CID ⊔ ⊔ ‡a011444306
DAT 0 ⊔ ‡a20101109142131.0 ‡b20141009010000.0
DAT 1 ⊔ ‡a20141112165512.0 ‡b2025-01-01T19:27:24Z
DAT 2 ⊔ ‡a2025-01-01T18:30:02Z
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