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Dissertations / Theses on the topic 'Spur Gear'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Chitta, Sudeendra. "Elastohydrodynamic lubrication in spur gear and helical gear contacts." Thesis, KTH, Maskinkonstruktion (Avd.), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-151246.

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The gears in a transmission are lubricated to prevent their premature failure as a result of pitting and wear on the tooth surfaces. Furthermore, the lubricant also limits the rise in surface temperature of the gears, which could otherwise lead to failure as a result of scuffing. The purpose of this thesis was to construct a fairly realistic theoretical lubrication model for spur and helical gears, the primary output parameters of this model being film thickness and flash temperatures, which would help in the identification of areas on the gear tooth surface prone to the aforementioned modes o

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2

Case, Sarah S. "Instantaneous Kinematic Analyses of Spur and Helical Gear Pairs Having Runout and Wobble Errors." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1523908436619245.

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3

Petry-Johnson, Travis T. "Experimental investigation of spur gear efficiency." Connect to resource, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1209585550.

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4

Bommisetty, Venkata Satya Naga Karthik. "FINITE ELEMENT ANALYSIS OF SPUR GEAR SET." Cleveland State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=csu1337268681.

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5

He, Song. "Effect of Sliding Friction on Spur and Helical Gear Dynamics and Vibro-Acoustics." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1200371418.

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6

Milliren, Matthew Britt. "An Experimental Investigation of the Influence of Various Gear Steels on the Contact Fatigue Lives of Hard Ground Spur Gears." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1307622355.

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7

Udthala, Aparna. "Contact Fatigue of Spur Gear Operating Under Starved Lubrication Condition." Wright State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=wright1619554628009744.

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8

Steward, Julian Holmes. "Elastic analysis of load distribution in wide-faced spur gears." Thesis, University of Newcastle Upon Tyne, 1989. http://hdl.handle.net/10443/804.

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The load distribution across the contact line(s) of spur gears is essential for the gear designer to be able to accurately stress gears for a given application. Existing gear standards (eg BS 436, AGMA 218 DIN 3990) use a thin slice (2D) model of the meshing gear teeth to estimate the contact line load distribution. This approach clearly fails to model properly teeth subjected to mal-distributed loads, since the buttressing effect of adjacent tooth sections tends to flatten the load distribution. Non-linear tooth modifications such as crowning and some forms of lead correction are also inadequ

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9

Xinmin, Li. "Efficiency and wear properties of spur gears made of powder metallurgy materials." Doctoral thesis, KTH, Maskinkonstruktion (Inst.), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-187446.

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Powder metallurgy (PM) is usually used in manufacturing parts with complex geometries, such as gears and structural parts. The main attractions of PM are the high rate of material utilization, environmental friendliness of production, economic advantages (especially for complex geometries), and possibility of obtaining lighter components. To find a wide range of applications and compete with regular steel gears, PM gear transmissions should have good transmission efficiency and wear properties. Furthermore, they should have low contact noise and adequate surface fatigue properties. Because of

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10

Wang, Zhongwei. "Dynamic modelling of planetary gear systems for gear tooth fault." Thesis, Curtin University, 2010. http://hdl.handle.net/20.500.11937/1284.

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Geared systems have been widely used in mechanical applications for more than a hundred years. A large range of literature has been published especially for spur/helical gear systems and the investigations into technical areas of spur/helical gears have been very well developed, including understanding of condition monitoring systems, diagnostic and prognostic methods. However, there is a lack of understanding on the general dynamic behavior of planetary gear systems with tooth faults. Planetary gears are normally used as effective power transmission elements with high power to weight/volume r

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11

Liu, Huaiju. "Lubricated contact analysis of a spur gear pair with dynamic loads." Thesis, University of Warwick, 2013. http://wrap.warwick.ac.uk/57917/.

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In the present research study, a comprehensive spur gear lubrication analysis has been carried out to understand the gear contact behaviour under lubrication conditions. The modelling works have been extended to consider the effects of thermal mechanical, non-Newtonian fluid, surface roughness, transient squeeze and dynamic load conditions. First, the elastohydrodynamic lubrication theory is studied and relevant numerical approaches are introduced. The reduced Reynolds equation technique is applied to deal with any potential "asperity contacts" or any other ultra-thin film situations. Those si

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12

Ding, Huali. "Dynamic wear models for gear systems." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1194025602.

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13

Hwang, Jenq-Fong. "Advanced computer-aided design method on the stress analysis of internal spur gears." Connect to this title online, 1986. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1102453550.

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14

Masat, Mehmet. "Design And Implementation Of Hot Precision Forging Die For A Spur Gear." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608550/index.pdf.

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There is a strong need in forging industry to reduce waste of material, improve quality, and reduce cost of forgings. About 30% of the material is wasted during conventional closed-die forging. Therefore, in order to reduce the cost of forged products and to obtain near-net or net shape parts, new forging methods should be applied. Precision forging concept is a cost-effective way to produce net-shape or near-net shape components. In recent years, there has been an increased interest in the production of gears by the net-shape forging technique. This has specific advantages over the traditiona

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15

Jaiswal, Preetish. "Influence of Various Surface Treatments on Power Losses of Spur Gear Pairs." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492685479305247.

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16

Harianto, Jonny. "The effect of manufacturing errors on predicted dynamic factors of spur gear." Connect to resource, 1995. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1144693877.

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Thesis (M.S.)--Ohio State University, 1995.<br>Advisor: Donald R. Houser, Dept. of Mechanical Engineering. Includes bibliographical references (leaves 99-100). Available online via OhioLINK's ETD Center

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17

Kelso, Michael Patrick. "The effects of quasi-steady loading on a virtual spur gear model." Thesis, University of Iowa, 2011. https://ir.uiowa.edu/etd/1236.

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With the projected growth of wind energy in the United States expected to account for 20% of the energy portfolio by 2030, it can be expected that wind turbines will not only increase in number, but also in size. This increase in size implies that internal components, such as the gearbox, will also increase to handle the higher loads. And given the high failure rates for gearbox components already in existence, one could expect more failure if nothing is done to improve reliability. It is well known that wind loading is not constant, rather it is random and ultimately causes fatigue loading. T

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18

Klein, Mark Andrew. "An Experimental Investigation of Materials and Surface Treatments on Gear contact Fatigue Life." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1243885964.

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19

Sun, Allen Y. "An Experimental Study of the Dynamic Response of Spur Gears Having Tooth Index Errors." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1430749459.

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20

Anichowski, Brian Jr. "An Experimental Investigation of the Effect of Spacing Errors on the Loaded Transmission Error of Spur Gear Pairs." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492619887370311.

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21

Li, Zheng. "Spur gear teeth contact analysis on power-train transmission noise, vibration and harshness." Thesis, University of Warwick, 2009. http://wrap.warwick.ac.uk/3163/.

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The gear meshing is very complex process as high non-linearity behaviour is involved during the process. Normally most analysis of gear tooth contact is on the basis of a hypothesis that the contacted gear teeth are cantilever beams to obtain the approximate results quickly. However, many important factors have been ignored in simulating gear tooth contact using cantilever beam hypothesis, those factors include tooth profile variations, gear rotation speed and input torque, coefficient of friction and geometry distortion. Many of non-linear responses such as noise, vibration, abrasion and so o

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22

Ashok, Kedilaya Suhas. "A Study on the Long Cycle Micro-pitting Behavior of Spur Gear Pairs." The Ohio State University, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1618574756469975.

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23

Feng, Ming-Fa. "A finite element study of bending stress variation in meshed spur gear pairs." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/87645.

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A study of the bending stresses in a pair of meshed spur gears using the finite element method is presented. The models analyzed were in the shape of a circular gear with five teeth or a five-tooth rack. A unit torque (1 lbf-ft) was applied as the form of nodal forces on the nodes around the bore hole of the driver pinion. The nodes around the bore hole of the driven gear (or the nodes along the back of the driven rack) were fixed. In order to transmit the power from the driver pinion to the driven gear (or rack), the points in contact were made coincident. Seven model groups with same diame

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24

Holub, Allison. "Mobility Analysis of a Spur Gear Pair and the Examination of Sliding Friction." The Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=osu1419264568.

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25

Milliren, Mark R. "AN EXPERIMENTAL INVESTIGATION INTO THE INFLUENCE OF VARIOUS ERRORS ON THE TRANSMISSION ERROR AND ROOT STRESSES OF SPUR GEARS." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1314209495.

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26

Richter-Allen, Astrid. "Testing and analysis of a novel spur gear design using double integral bearing raceways." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/39392.

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27

Xu, Rixin. "Finite Element Modeling and Simulation on the Quenching Effect for Spur Gear Design Optimization." University of Akron / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1217868964.

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28

Lim, Tiffany Wen Roe. "An Experimental Study on the Effects of Debris Damage on Scuffing Performance of Spur Gear Pairs." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1523539700605647.

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29

Chowdhury, Sanjib. "Effect of Shaft Vibration on the Dynamics of Gear and Belt Drives." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1267990279.

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30

Franzen, Justin Michael. "Contact Fatigue Evaluation of Ground and Chemically Polished Spur Gears Made of AISI 4118 Alloy Steel." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1370260045.

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31

Dharmarajan, Vignesh. "An Investigation on Spur Gear Rolling Contact Fatigue Crack Initiation and Crack Propagation under EHL Condition." Wright State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=wright1578319670376195.

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32

Andersson, Martin. "An experimental investigation of spur gear efficiency and temperature : A comparison between ground and superfinished surfaces." Doctoral thesis, KTH, Maskinkonstruktion (Inst.), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202990.

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This thesis focuses on reliability when testing gear efficiency and on how gear mesh efficiency can be increased without detrimental effects on the gears. Test equipment commonly used in gear research was analysed to identify important parameters for gear efficiency testing. The effect of the bearing model's load-dependent losses on gear mesh efficiency was also investigated. Two different surface finishes of gears, ground and superfinished, were investigated to determine how two different load levels during running-in affect gear mesh efficiency and changes in surface roughness. Efficiency an

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33

Tharmakulasingam, Raul. "Transmission error in spur gears : static and dynamic finite-element modeling and design optimization." Thesis, Brunel University, 2010. http://bura.brunel.ac.uk/handle/2438/5100.

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The gear noise problem that widely occurs in power transmission systems is typically characterised by one or more high amplitude acoustic signals. The noise originates from the vibration of the gear pair system caused by transmission error excitation that arises from tooth profile errors, misalignment and tooth deflections. This work aims to further research the effect of tooth profile modifications on the transmission error of gear pairs. A spur gear pair was modelled using finite elements, and the gear mesh was simulated and analysed under static conditions. The results obtained were used to

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34

Anandika, Muhammad Nevin. "An Experimental Investigation of the Impact of Random Spacing Errors onthe Transmission Error of Spur and Helical Gear Pairs." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1574680868815187.

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35

Polly, Joseph H. "An Experimental Investigation of Churning Power Losses of a Gearbox." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1362745236.

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36

Massé, Danielle D. "Effects of Lubrication Starvation on Flash Temperature for Thermal Mixed Elastohydrodynamic Gear Contacts." Wright State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=wright1574433184018376.

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37

Jayasankaran, Kathik. "STRUCTURE-BORNE NOISE MODEL OF A SPUR GEAR PAIR WITH SURFACE UNDULATION AND SLIDING FRICTION AS EXCITATIONS." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1269451200.

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38

Moss, Jeremy C. "A Comparative Study of the Impact of Dip and Jet Lubrication Methods on Spur Gear Contact Fatigue and Efficiency." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1467809931.

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39

Chaudhury, Kreteeka. "An Experimental Investigation of the Impact of Engineered Surface Processes on Efficiency of Spur Gears." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1556553897979376.

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40

Handschuh, Michael James. "An Investigation into the Impact of Random Spacing Errors on Static Transmission Error and Root Stresses of Spur Gear Pairs." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1365609506.

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41

Daniewicz, Steve. "Conception and development of improved analytical prediction models for fatigue induced tooth breakage due to cyclic bending in spur gear teeth." Connect to resource, 1991. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1207598214.

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42

Daniewicz, Steven R. "Conception and development of improved analytical prediction models for fatigue induced tooth breakage due to cyclic bending in spur gear teeth /." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487687959968335.

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43

Fargere, Romain. "Simulation du comportement dynamique des transmissions par engrenages sur paliers hydrodynamiques." Thesis, Lyon, INSA, 2012. http://www.theses.fr/2012ISAL0130/document.

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Ce travail vise à prédire le comportement dynamique de transmissions par engrenages supportées par des paliers hydrodynamiques, semblables à celles utilisées dans le domaine de la propulsion navale. Un modèle couplé de transmission mécanique est présenté ; il traite la plupart des interactions possibles entre les engrenages, les arbres et les paliers. Un élément d’engrenages à dentures larges, avec raideur non linéaire et dépendante du temps, est combiné à des éléments finis de poutre alors que la contribution des paliers est introduite par la résolution directe de l’équation de REYNOLDS et d’

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44

Ostiguy, Matthew James. "Experiment and Simulation of the Acoustic Signature of Fatigued-Cracked Gears in a Two-Stage Gearbox." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1328.

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This thesis focuses on the development of a health monitoring system for gearbox transmissions. This was accomplished by developing and understanding a two-stage gearbox computer model that emulates an actual gearbox test rig. The computer model contains actual gearbox geometry, flexible shafts, bearings, gear contact forces, input motor torque, output brake torque, and realistic gearbox imbalance. The gear contact force of each gear stage and the input bearing translational acceleration were the main outputs compared between a healthy gearbox and damaged gearbox computer model. The damage of

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45

Lago, Daniel Fabiano [UNESP]. "Manutenção de redutores de velocidade pela integração das técnicas preditivas de análise de vibrações e análise de óleo lubrificante." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/94548.

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Made available in DSpace on 2014-06-11T19:27:14Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-11-13Bitstream added on 2014-06-13T19:55:36Z : No. of bitstreams: 1 lago_df_me_ilha.pdf: 2600686 bytes, checksum: 82a754d34e90e3dd82ddaab84ab68958 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Todo sistema ou equipamento mecânico está sujeito a processos de deterioração. Esta deterioração leva ao aparecimento de defeitos que podem atrapalhar a continuidade e qualidade do serviço (produção). Uma quebra não prevista traduz-se por uma parada brusca, levando ge

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46

Barvík, Rostislav. "Řešení pohonu vačkového hřídele pomocí ozubených kol." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-228979.

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For dimensions of crankshaft drive Zetor engine, which is solve by a helical gear drive will be created a dynamic model in MBS (multi body system) and perform analyses. The same way will be created a dynamic model for a spur gear system. In conclusion will be confrontation both of these drive solutions.

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47

Planka, Michal. "Využití neuronových sítí pro výpočet průběhu záběrové tuhosti soukolí s čelními ozubenými koly." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318391.

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The aim of this master's thesis is to build artificial neural network that is able to calculate varying single tooth-pair mesh stiffness of spur gear for given input parameters. The training set for this network was determined by computational modelling by finite element method. Therefore, creating of computational model and mesh stiffness calculating were a partial aim of this thesis. Input parameters for stiffness calculation were number of driving and driven gear teeth and gear loading. Creating of computational model and performing series of simulations was followed by creating artificial

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48

Flodin, Anders. "Wear of spur and helical gears." Doctoral thesis, KTH, Machine Design, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2986.

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49

Lago, Daniel Fabiano. "Manutenção de redutores de velocidade pela integração das técnicas preditivas de análise de vibrações e análise de óleo lubrificante /." Ilha Solteira : [s.n.], 2007. http://hdl.handle.net/11449/94548.

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Orientador: Aparecido Carlos Gonçalves<br>Banca: Gilberto Pechoto de Melo<br>Banca: Jorge Nei Brito<br>Resumo: Todo sistema ou equipamento mecânico está sujeito a processos de deterioração. Esta deterioração leva ao aparecimento de defeitos que podem atrapalhar a continuidade e qualidade do serviço (produção). Uma quebra não prevista traduz-se por uma parada brusca, levando geralmente a grandes prejuízos e a perda de tempo de produção. Para evitar paradas inesperadas eficientemente e reduzir os custo de manutenção são utilizadas técnicas de manutenção preditiva. Entre todas as técnicas existen

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50

Wang, Jiande. "Numerical and Experimental Analysis of Spur Gears in Mesh." Thesis, Curtin University, 2003. http://hdl.handle.net/20.500.11937/879.

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The investigation of numerical methods for modelling the mechanism properties of involute spur gears in mesh, over the mesh cycle, forms the major part of this thesis. Gearing is perhaps one of the most critical components in power transmission systems and the transmission error of gears in mesh is considered to be one of the main causes of gear noise and vibration. Numerous papers have been published on gear transmission error measurement and many investigations have been devoted to gear vibration analysis. There still, however, remains to be developed a general Finite Element Model capable o

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