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Title: Non-newtonian mixed elastohydrodynamics of differential hypoid gears at high loads
Authors: Mohammadpour, Mahdi
Theodossiades, Stephanos
Rahnejat, Homer
Saunders, T.
Keywords: Automobile differential
Hypoid gear pairs
Non-Newtonian limiting shear
Elastohydrodynamic lubrication
Transmission efficiency
Issue Date: 2013
Publisher: © Springer
Citation: MOHAMMADPOUR, M. ... et al, 2013. Non-newtonian mixed elastohydrodynamics of differential hypoid gears at high loads. Meccanica, 49 (5), pp 1115-1138.
Abstract: Prediction of friction and transmission efficiency are design objectives in transmission engineering. Unlike spur and helical involute gears, there is a dearth of numerical analysis in the case of hypoid gear pairs. In particular, it is important to take into account the side leakage of the lubricant from the contact as the result of the lubricant entrainment at an angle to the elliptical contact footprint. In the automobile differential hypoid gears, high loads result in non-Newtonian behaviour of the lubricant, which may exceed its limiting shear stress, a fact which has not been taken into account in the open literature. This results in conditions which deviate from observed experimental tractive behaviour. The paper takes into account these salient practical features of hypoid gear pair analysis under high load. It highlights a non-Newtonian shear model, which limits the lubricant shear behaviour. Prediction of friction and transmission efficiency is in line with those reported in the literature.
Description: The final publication is available at Springer via http://dx.doi.org/10.1007/s11012-013-9857-x
Version: Accepted for publication
DOI: 10.1007/s11012-013-9857-x
URI: https://dspace.lboro.ac.uk/2134/14303
Publisher Link: http://dx.doi.org/10.1007/s11012-013-9857-x
ISSN: 0025-6455
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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