Fatigue life analysis for traction drives with application to a toroidal type geometry

Author:: Zaretsky, E. V.
Published:: Dec 1, 1976.
Physical Description:: 1 electronic document
Additional Creators:: Loewenthal, S. H. and Coy, J. J.

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Summary:

A contact fatigue life analysis for traction drives was developed which was based on a modified Lundberg-Palmgren theory. The analysis was used to predict life for a cone-roller toroidal traction drive. A 90-percent probability of survival was assumed for the calculated life. Parametric results were presented for life and Hertz contact stress as a function of load, drive ratio, and size. A design study was also performed. The results were compared to previously published work for the dual cavity toroidal drive as applied to a typical compact passenger vehicle drive train. For a representative duty cycle condition wherein the engine delivers 29 horsepower at 2000 rpm with the vehicle moving at 48.3 km/hr (30 mph) the drive life was calculated to be 19,200 km (11 900 miles).

Other Subject(s):

MECHANICAL ENGINEERING

Collection:

NASA Technical Reports Server (NTRS) Collection.

Note:

Document ID: 19770007541.
Accession ID: 77N14484.
E-8737.
NASA-TN-D-8362.

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