Loading...
Please wait, while we are loading the content...
Similar Documents
Effect of viscosity on rolling-element fatigue life at cryogenic temperature with fluorinated ether lubricants
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Zaretsky, E. V. Dietrich, M. W. |
| Copyright Year | 1975 |
| Description | Rolling-element fatigue tests were conducted with 12.7-mm-(1/2-in.-) diameter AISI 52100 steel balls in the NASA five-ball fatigue tester, with a maximum hertz stress of 5500 mN/m2 (800 000 psi), a shaft speed of 4750 rpm, lubricant temperature of 200 K (360 R), a contact angle of 20 deg, using four fluorinated ether lubricants of varying viscosities. No statistically significant differences in rolling-element fatigue life occurred using the four viscosity levels. Elastohydrodynamic calculations indicate that values of the lubricant film parameter were approximately 2 or greater. |
| File Size | 876683 |
| Page Count | 22 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19750012658 |
| Archival Resource Key | ark:/13960/t7dr7mt59 |
| Language | English |
| Publisher Date | 1975-04-01 |
| Access Restriction | Open |
| Subject Keyword | Mechanical Engineering Elastohydrodynamics Viscosity Fatigue Life Fluorine Organic Compounds Cryogenics Lubrication Ethers Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
