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  • 1
    Publication Date: 2006-10-26
    Description: Bending moment of vehicle in terms of control parameters - vehicle elastic and sloshing modes
    Keywords: STRUCTURAL MECHANICS
    Format: text
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  • 2
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    In:  CASI
    Publication Date: 2011-04-08
    Description: Guide for gear designers, consisting of theory, calculations, charts, curves and references, explains lubrication requirements for gears to insure maximum performance. Mechanical and service variables are considered in order to obtain optimum gear performance under severe operating conditions.
    Keywords: MATERIALS
    Type: LEW-11483
    Format: application/pdf
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  • 3
    Publication Date: 2019-07-12
    Description: Surface-fatigue tests conducted with AISI 9310 steel spur gears show surface-fatigue life of AISI 9310 steel spur gears increased as much as 400 percent by addition of small amount of phosphorus-type extreme-pressure (EP) additive in lubricant. Antiwear or EP additives either absorbed onto surface or react with surface to form protective coating or surface film. Boundary film provides barrier that prevents contact of metal surfaces and provides low shear strength, which reduces friction coefficient below base metal.
    Keywords: MATERIALS
    Type: LEW-14314 , NASA Tech Briefs (ISSN 0145-319X); 10; 5; P. 84
    Format: text
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  • 4
    Publication Date: 2019-07-13
    Description: Elastohydrodynamic principles affecting the lubrication of transmission components are presented and discussed. Surface temperatures of the transmission bearings and gears affect elastohydrodynamic film thickness. Traction forces and sliding as well as the inlet temperature determine surface temperatures. High contact ratio gears cause increased sliding and may run at higher surface temperatures. Component life is a function of the ratio of elastohydrodynamic film thickness to composite surface roughness. Lubricant starvation reduces elastohydrodynamic film thickness and increases surface temperatures. Methods are presented which allow for the application of elastohydrodynamic principles to transmission design in order to increase system life and reliability.
    Keywords: STRUCTURAL MECHANICS
    Type: AHS PREPRINT 770 , Annual National Forum; May 9-11, 1973; Washington, DC
    Format: text
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