Accession Number : ADA302714

Title :   Surface Temperatures and Glassy State Investigations in Tribology. Part 3.

Descriptive Note : Contract rept.,

Corporate Author : GEORGIA INST OF TECH ATLANTA

Personal Author(s) : Bair, Scott S. ; Winer, Ward O.

PDF Url : ADA302714

Report Date : APR 1980

Pagination or Media Count : 85

Abstract : The research reported covers the continued development of the limiting shear stress shear rheological model. This development consists of both property measurements pursuant to the use of the constitutive equation and the application of the constitutive equation to ERD traction and flim thickness predictions. It has been shown that the history the material undergoes influences the limiting shear stress. Previously materials were subjected to isobaric cooling. Techniques were developed to subject materials to isothermal compression which is similar to what occurs in ERD contacts. The limiting shear stress from the isothermal compression is approximately 10 percent less than that from isobaric cooling. This more relevant determination of limiting shear stress and elastic shear modulus is reported for several lubricants. In addition, an apparatus has also been developed for measuring the shear stress-strain behavior of solid lubricating materials. Four materials have been examined under pressure.

Descriptors :   *LUBRICANTS, COMPRESSION, STRESS STRAIN RELATIONS, ELASTIC PROPERTIES, AMORPHOUS MATERIALS, GLASS, COOLING, SHEAR STRESSES, TRACTION, SOLID LUBRICANTS, SURFACE TEMPERATURE, VISCOSITY, ISOTHERMS, ISOBARS(PRESSURE).

Subject Categories : Lubricants and Hydraulic Fluids

Distribution Statement : APPROVED FOR PUBLIC RELEASE