Author: Paisan SomprakitPublisher:
ISBN:
Category :
Languages : en
Pages : 314
Book Description
Contact Stress Analysis in Meshing Gear Teeth
Author: Paisan SomprakitA New Procedure for Calculating Contact Stresses in Gear Teeth
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781722010546
Category :
Languages : en
Pages : 28
Book Description
A numerical procedure for evaluating and monitoring contact stresses in meshing gear teeth is discussed. The procedure is intended to extend the range of applicability and to improve the accuracy of gear contact stress analysis. The procedure is based upon fundamental solution from the theory of elasticity. It is an iterative numerical procedure. The method is believed to have distinct advantages over the classical Hertz method, the finite-element method, and over existing approaches with the boundary element method. Unlike many classical contact stress analyses, friction effects and sliding are included. Slipping and sticking in the contact region are studied. Several examples are discussed. The results are in agreement with classical results. Applications are presented for spur gears. Somprakit, Paisan and Huston, Ronald L. Unspecified Center NSG-3188; DA PROJ. 1L1-62211-A-47-A; RTOP 505-63-36...
Contact Stresses in Meshing Spur Gear Teeth: Use of an Incremental Finite Element Procedure
Author: Procedure for Tooth Contact Analysis of a Face Gear Meshing with a Spur Gear Using Finite Element Analysis
Author: National Aeronautics and Space Adm NasaPublisher: Independently Published
ISBN: 9781723748578
Category : Science
Languages : en
Pages : 30
Book Description
A procedure was developed to perform tooth contact analysis between a face gear meshing with a spur pinion using finite element analysis. The face gear surface points from a previous analysis were used to create a connected tooth solid model without gaps or overlaps. The face gear surface points were used to create a five tooth face gear Patran model (with rim) using Patran PCL commands. These commands were saved in a series of session files suitable for Patran input. A four tooth spur gear that meshes with the face gear was designed and constructed with Patran PCL commands. These commands were also saved in a session files suitable for Patran input. The orientation of the spur gear required for meshing with the face gear was determined. The required rotations and translations are described and built into the session file for the spur gear. The Abaqus commands for three-dimensional meshing were determined and verified for a simplified model containing one spur tooth and one face gear tooth. The boundary conditions, loads, and weak spring constraints were determined to make the simplified model work. The load steps and load increments to establish contact and obtain a realistic load was determined for the simplified two tooth model. Contact patterns give some insight into required mesh density. Building the two gears in two different local coordinate systems and rotating the local coordinate systems was verified as an easy way to roll the gearset through mesh. Due to limitation of swap space, disk space and time constraints of the summer period, the larger model was not completed.Bibel, George and Lewicki, David G. (Technical Monitor)Glenn Research CenterROTATION; GEAR TEETH; BOUNDARY CONDITIONS; FINITE ELEMENT METHOD; TIME; COMPUTER PROGRAMS; LOADS (FORCES)
Gear Geometry and Applied Theory
Author: Faydor L. LitvinPublisher: Cambridge University Press
ISBN: 9780521815178
Category : Technology & Engineering
Languages : en
Pages : 818
Book Description
This revised, expanded edition covers the theory, design, geometry, and manufacture of all types of gears and gear drives. An invaluable reference for designers, theoreticians, students, and manufacturers, the second edition includes advances in gear theory, gear manufacturing, and computer simulation. Among the new topics are: new geometry for gears and pumps; new design approaches for planetary gear trains and bevel gear drives; an enhanced approach for stress analysis; new methods of grinding and gear shaving; and new theory on the simulation and its application. First Edition published by Pearson Education Hb (1994): 0-132-11095-4
Contact Stresses of Meshing Gear Teeth
Author: Chih-Ming HsiehA Procedure for 3-D Contact Stress Analysis of Spiral Bevel Gears
Author: The Geometry of Involute Gears
Author: J.R. ColbournePublisher: Springer Science & Business Media
ISBN: 1461247640
Category : Technology & Engineering
Languages : en
Pages : 539
Book Description
Of all the many types of machine elements which exist today, gears are among the most commonly used. The basic idea of a wheel with teeth is extremely simple, and dates back several thousand years. It is obvious to any observer that one gear drives another by means of the meshing teeth, and to the person who has never studied gears, it might seem that no further explanation is required. It may therefore come as a surprise to discover the large quantity of geometric theory that exists on the subject of gears, and to find that there is probably no branch of mechanical engineering where theory and practice are more closely linked. Enormous improvements have been made in the performance of gears during the last two hundred years or so, and this has been due principally to the careful attention given to the shape of the teeth. The theoretical shape of the tooth profile used in most modern gears is an involute. When precision gears are cut by modern gear-cutting machines, the accuracy with which the actual teeth conform to their theoretical shape is quite remarkable, and far exceeds the accuracy which is attained in the manufacture of most other types of machine elements. The first part of this book deals with spur gears, which are gears with teeth that are parallel to the gear axis. The second part describes helical gears, whose teeth form helices about the gear axis.
Face Gear Drive with Spur Involute Pinion: Geometry, Generation by a Worm, Stress Analysis
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 52
Book Description
A face gear drive with a spur involute pinion is considered. The generation of the face gear is based on application of a grinding or cutting worm whereas the conventional method of generation is based on application of an involute shaper. An analytical approach for determination of: (1) the worm thread surface, (2) avoidance of singularities of the worm thread surface, (3) dressing of the worm, and (4) determination of stresses of the face-gear drive, is proposed. A computer program for simulation of meshing and contact of the pinion and face-gear has been developed. Correction of machine-tool settings is proposed for reduction of the shift of the bearing contact caused by misalignment. An automatic development of the model of five contacting teeth has been proposed for stress analysis. Numerical examples for illustration of the developed theory are provided.
Gear Drive Systems
Author: Peter LynwanderPublisher: CRC Press
ISBN: 1351446061
Category : Science
Languages : en
Pages : 432
Book Description
This outstanding reference provides the complete range of practical and theoretical information - with over 250 detailed illustartions, fugures and table- needed to design, manufacture and operate reliable, efficient gear drive systems, emphasizing parallel shaft and planetary units with spur and helical gearing.