NASA technical note

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Page 3 - NASA Langley Research Center Hampton, Va. 23665 11. Contract or Grant No. 13. Type of Report and Period Covered 12. Sponsoring Agency Name and Address Technical Note National Aeronautics and Space Administration Washington, DC 20546 14.
Page 5 - This fatigue tester consists essentially of an upper test ball pyramided on four lower balls that are positioned by a separator and are free to rotate in an angular- contact raceway.
Page 25 - COREST: A FORTRAN computer program to analyze paralinear oxidation behavior and its application to chromic oxide forming alloys...
Page 27 - The Prediction of Free Turbulent Boundary Layers by Use of a Two-Equation Model of Turbulence.
Page 6 - The statistical methods of [8] for analyzing rolling-element fatigue data were used to obtain a plot of the log-log of the reciprocal of the probability of survival as a function of the log of stress cycles to failure (Weibull coordinates). For convenience, the ordinate is graduated in statistical percent of specimens failed. From...
Page 1 - Category 37 19. Security Classif. (of this report) 20. Security Classif. (of this pagel 21. No. o f Pages 22. Price...
Page 11 - Bamberger, EN, et al., Life Adjustment Factors for Ball and Roller Bearings — an Engineering Design Guide, ASME, New York, 1971.
Page 5 - Specimen temperature range (88.7 to 1366.5 K). The tester consists essentially of a driven test ball pyramided on four lower balls. The four balls are positioned by a separator and are free to rotate in an angular-contact raceway. The upper test ball and the raceway are analogous in operation to the inner and outer races of a bearing. The separator and the lower balls are similar in function to the cage and the balls of a bearing. Specimen loading and drive is supplied through a vertical shaft. By...
Page 6 - ... contact pressure required to transmit a given amount of torque is principally dependent on the tractive properties of the lubricant. Lubricants formulated for traction-drive applications typically have high coefficients of traction. The generic term for these oils is traction fluids. Rolling element fatigue tests were run in the five-ball fatigue tester with two traction fluids, a tetraester with and without additives, a synthetic paraffinic oil, and a paraffinic mineral oil [32.
Page 1 - Subject Category 39 19. Security Classif. (of this report) 20. Security Classif. (of this page) 21. No. of Pages 96 22.

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