Measurement of Properties and Response Functions of Liquid Lubricants Related to Transient Viscoelastic Regimes.
Abstract
This report is concerned with measurements of the viscoelastic response functions over a wide range of frequency and pressure that are required for the mechanical characterization of lubricating oils. Both rheo-optical (light scattering) and mechanical (ultrasonic) methods are required to obtain the viscoelastic data. Several developmental aspects of the implementation of these techniques as well as some of the results are discussed herein. The emphasis of this report is on (1) development of techniques required to obtain light scattering from lubricants in the high pressure diamond anvil cell. These low frequency data analyses based on scattering from nonmagnetic and from magnetic spheres suspended in the liquid, and Brillouin line width measurements to yield both elastic modulus and loss of the liquids in the range circa 10 to the 8th power - 10 to the 9th power Hz, (2) preliminary results on steady-state viscosity of the test fluids at atmospheric pressure, (3) new experimental results on the role of additives in determining the viscoelastic response of lubricants. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1978
- Accession Number
- ADA062612
Entities
People
- Meyer H. Birnboim
Organizations
- Rensselaer Polytechnic Institute