Khurram Sharif

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The paper presents the theoretical basis for modelling the contact conditions and elas-tohydrodynamic lubrication (EHL) of worm gears, the results of which are presented in Part 2. The asymmetric elongated contact that typi®es worm gears is non-Hertzian and is treated using a novel three-dimensional elastic contact simulation technique. The kinematic(More)
The paper presents the results of modelling the contact and elastohydrodynamic lubrication (EHL) eVects between the teeth of worm gears. A number of diVerent practical worm gear designs have been studied covering a wide range of sizes and potential applications, from small instrument drives to high power units. All the designs are of the popular ZI type, in(More)
This article presents the results of a series of thermal elastohydrodynamic lubrication (EHL) analyses of a set of disc experiments carried out by Patching et al. The authors have previously calculated the heat partition at each load stage from the experimental data, and the present work seeks to compare the heat partition developed in a thermal EHL(More)
The paper describes the application of a full non-Newtonian, thermal elastohydrodynamic lubrication (EHL) model for the prediction of film thickness and viscous traction force in a special high speed rolling traction rig. The primary objective of the work was to identify a suitable lubricant rheological model that would describe the behavior of practical(More)
The paper is concerned with prediction of elastic contact and elastohydrodynamic film thickness in worm gears. Using the undeformed geometry of the gap between gear teeth in contact a three-dimensional elastic contact simulation technique has been developed for calculation of the true area of elastic contact under load relative to the wheel and worm(More)
This paper explores the nature of trust and satisfaction existing between service providers (large organizations) and a network of 47 distributors (small organizations) within the Kuwaiti telecommunications sector. Data was collected using a questionnaire based survey involving a convenience sample of 209 respondents representing 47 distributor outlets. The(More)
Worm gears used for power transmission commonly consist of a steel worm running against a bronze or phosphor bronze worm wheel. The wheel teeth are usually manufactured using an 'oversize' hob so that the initial elastic contact between the teeth is in the form of an ellipse with lubricant entrainment predominantly in the major axis direction. As a result(More)
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