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Comparison Of Experimental And Analytical Tooth Bending Stress Of Aerospace Spiral Bevel Gears Nasa Tm 1999 208903 Mar 26 1999
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Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781723998676 Total Pages :34 pages Book Rating :4.9/5 (986 download)
Book Synopsis Comparison of Experimental and Analytical Tooth Bending Stress of Aerospace Spiral Bevel Gears by : National Aeronautics and Space Adm Nasa
Download or read book Comparison of Experimental and Analytical Tooth Bending Stress of Aerospace Spiral Bevel Gears written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-25 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study to investigate the bending stress in aerospace-quality spiral bevel gears was performed. Tests were conducted in the NASA Lewis Spiral Bevel Gear Test Facility. Multiple teeth on the spiral bevel pinion were instrumented with strain gages and tests were conducted from static (slow roll) to 14400 RPM at power levels to 540kW (720 hp). Effects of changing speed and load on the bending stress were measured. Experimental results are compared to those found by three-dimensional finite element analysis. Handschuh, Robert F. and Bibel, George D. Glenn Research Center NASA/TM-1999-208903, NAS 1.15:208903, E-11365-1, ARL-TR-1891
Book Synopsis Comparison of Experimental and Analytical Tooth Bending Stress of Aerospace Spiral Bevel Gears by :
Download or read book Comparison of Experimental and Analytical Tooth Bending Stress of Aerospace Spiral Bevel Gears written by and published by . This book was released on 1999 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study to investigate the bending stress in aerospace-quality spiral bevel gears was performed. Tests were conducted in the NASA Lewis Spiral Bevel Gear Test Facility. Multiple teeth on the spiral bevel pinion were instrumented with strain gages and tests were conducted from static (slow roll) to 14400 RPM at power levels to 540kW (720 hp). Effects of changing speed and load on the bending stress were measured. Experimental results are compared to those found by three-dimensional finite element analysis.
Download or read book Making Sense of Census 2000 written by and published by . This book was released on 1999 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Comparison of Face-Milled and Face-Hobbed Spiral Bevel Gears by :
Download or read book Experimental Comparison of Face-Milled and Face-Hobbed Spiral Bevel Gears written by and published by . This book was released on 2001 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental comparison of face-milled and face-hobbed spiral bevel gears was accomplished. The two differently manufactured spiral bevel gear types were tested in a closed-loop facility at NASA Glenn Research Center. Strain, vibration, and noise testing were completed at various levels of rotational speed and load. Tests were conducted from static (slow-roll) to 12600 rpm and up to 269 N.m (2380 in.lb) pinion speed and load conditions. The tests indicated that the maximum stress recorded at the root locations had nearly the same values, however the stress distribution was different from the toe to the heel. Also. the alternating stress measured was higher for the face-milled pinion than that attained for the face-bobbed pinion (larger minimum stress). The noise and vibration results indicated that the levels measured for the face-bobbed components were less than those attained for the face-milled gears tested.
Download or read book Of Interest to Visitors written by and published by . This book was released on 1999 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biologically Inspired Robots by : Shigeo Hirose
Download or read book Biologically Inspired Robots written by Shigeo Hirose and published by . This book was released on 1993 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Living systems often exhibit a fascinating repertoire of phenomena that inspire new engineering solutions to old problems. This book is an account of the author's investigations of the locomotion of snakes and the application of his findings to a new class of robots displaying snake-like motions. The author expertly presents the case that robots in which whole mechanisms move have many potential applications that should be fully exploited in the future when the pertinent technological developments have been achieved. This unique work will be interesting to both robotics engineers and zoologists.
Book Synopsis Testing of Face-Milled Spiral Bevel Gears at High-Speed and Load by :
Download or read book Testing of Face-Milled Spiral Bevel Gears at High-Speed and Load written by and published by . This book was released on 2001 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spiral bevel gears are an important drive system components of rotorcraft (helicopters) currently in use. In this application the spiral bevel gears are required to transmit very high torque at high rotational speed. Available experimental data on the operational characteristics for thermal and structural behavior is relatively small in comparison to that found for parallel axis gears. An ongoing test program has been in place at NASA Glenn Research Center over the last ten years to investigate their operational behavior at operating conditions found in aerospace applications. This paper will summarize the results of the tests conducted on face-milled spiral bevel gears. The data from the pinion member (temperature and stress) were taken at conditions from slow-roll to 14400 rpm and up to 537 kW (720 hp). The results have shown that operating temperature is affected by the location of the lubricating jet with respect to the point it is injected and the operating conditions that are imposed. Also the stress measured from slow-roll to very high rotational speed, at various torque levels, indicated little dynamic affect over the rotational speeds tested.
Book Synopsis Kinematic Synthesis of Linkages by : Richard Scheunemann Hartenberg
Download or read book Kinematic Synthesis of Linkages written by Richard Scheunemann Hartenberg and published by . This book was released on 1964 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Senate Treaty Documents written by and published by Government Printing Office. This book was released on 1986 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Trails--Wayne National Forest written by and published by . This book was released on 1999 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Granular Herbicide Applicator by : Dave Gasvoda
Download or read book Granular Herbicide Applicator written by Dave Gasvoda and published by . This book was released on 1999 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Analytical Assessment of the Thermal Behavior of Spiral Bevel Gears by : Robert F. Handschuh
Download or read book Experimental and Analytical Assessment of the Thermal Behavior of Spiral Bevel Gears written by Robert F. Handschuh and published by . This book was released on 1995 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Old-growth Definition for Dry and Dry-mesic Oak-pine Forests by : David L. White
Download or read book An Old-growth Definition for Dry and Dry-mesic Oak-pine Forests written by David L. White and published by . This book was released on 1998 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781720459347 Total Pages :34 pages Book Rating :4.4/5 (593 download)
Book Synopsis Design and Stress Analysis of Low-Noise Adjusted Bearing Contact Spiral Bevel Gears by : National Aeronautics and Space Administration (NASA)
Download or read book Design and Stress Analysis of Low-Noise Adjusted Bearing Contact Spiral Bevel Gears written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-29 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: An integrated computerized approach for design and stress analysis of low-noise spiral bevel gear drives with adjusted bearing contact has been developed. The computation procedure is an iterative process, requiring four separate steps that provide: (a) a parabolic function of transmission errors that is able to reduce the effect of errors of alignment, and (b) reduction of the shift of bearing contact caused by misalignment. Application of finite element analysis permits the contact and bending stresses to be determined and investigate the formation of the bearing contact. The design of finite element models and boundary conditions is automated and does not require an intermediate CAD computer program. A commercially available finite element analysis computer program with contact capability was used to conduct the stress analysis. The theory developed is illustrated with numerical examples.Litvin, Faydor L. and Fuentes, Alfonso and Mullins, Baxter R. and Woods, RonGlenn Research CenterLOW NOISE; SPIRAL BEVEL GEARS; STRESS ANALYSIS; DESIGN ANALYSIS; MECHANICAL DRIVES; MATHEMATICAL MODELS; BEARINGS; BENDING FATIGUE; BOUNDARY CONDITIONS; MISALIGNMENT; FINITE ELEMENT METHOD; COMPUTER PROGRAMS
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781725000865 Total Pages :32 pages Book Rating :4.0/5 (8 download)
Book Synopsis A Method for Determining Spiral-Bevel Gear Tooth Geometry for Finite Element Analysis by : National Aeronautics and Space Administration (NASA)
Download or read book A Method for Determining Spiral-Bevel Gear Tooth Geometry for Finite Element Analysis written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-09 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analytical method was developed to determine gear tooth surface coordinates of face-milled spiral bevel gears. The method uses the basic gear design parameters in conjunction with the kinematical aspects of spiral bevel gear manufacturing machinery. A computer program, SURFACE, was developed. The computer program calculates the surface coordinates and outputs 3-D model data that can be used for finite element analysis. Development of the modeling method and an example case are presented. This analysis method could also find application for gear inspection and near-net-shape gear forging die design. Handschuh, Robert F. and Litvin, Faydor L. Glenn Research Center NASA-TP-3096, E-5837, NAS 1.60:3096, AVSCOM-TR-91-C-020, AD-A242332 DA PROJ. 1L1-62211-A-47-A; RTOP 505-63-51...
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722860585 Total Pages :78 pages Book Rating :4.8/5 (65 download)
Book Synopsis User's Manual for Tooth Contact Analysis of Face-Milled Spiral Bevel Gears with Given Machine-Tool Settings by : National Aeronautics and Space Administration (NASA)
Download or read book User's Manual for Tooth Contact Analysis of Face-Milled Spiral Bevel Gears with Given Machine-Tool Settings written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research was performed to develop a computer program that will: (1) simulate the meshing and bearing contact for face milled spiral beval gears with given machine tool settings; and (2) to obtain the output, some of the data is required for hydrodynamic analysis. It is assumed that the machine tool settings and the blank data will be taken from the Gleason summaries. The theoretical aspects of the program are based on 'Local Synthesis and Tooth Contact Analysis of Face Mill Milled Spiral Bevel Gears'. The difference between the computer programs developed herein and the other one is as follows: (1) the mean contact point of tooth surfaces for gears with given machine tool settings must be determined iteratively, while parameters (H and V) are changed (H represents displacement along the pinion axis, V represents the gear displacement that is perpendicular to the plane drawn through the axes of the pinion and the gear of their initial positions), this means that when V differs from zero, the axis of the pionion and the gear are crossed but not intersected; (2) in addition to the regular output data (transmission errors and bearing contact), the new computer program provides information about the contacting force for each contact point and the sliding and the so-called rolling velocity. The following topics are covered: (1) instructions for the users as to how to insert the input data; (2) explanations regarding the output data; (3) numerical example; and (4) listing of the program. Litvin, Faydor L. and Zhang, YI and Chen, Jui-Sheng Unspecified Center...
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781724226761 Total Pages :218 pages Book Rating :4.2/5 (267 download)
Book Synopsis Generation and Tooth Contact Analysis of Spiral Bevel Gears with Predesigned Parabolic Functions of Transmission Errors by : National Aeronautics and Space Administration (NASA)
Download or read book Generation and Tooth Contact Analysis of Spiral Bevel Gears with Predesigned Parabolic Functions of Transmission Errors written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-24 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new approach for determination of machine-tool settings for spiral bevel gears is proposed. The proposed settings provide a predesigned parabolic function of transmission errors and the desired location and orientation of the bearing contact. The predesigned parabolic function of transmission errors is able to absorb piece-wise linear functions of transmission errors that are caused by the gear misalignment and reduce gear noise. The gears are face-milled by head cutters with conical surfaces or surfaces of revolution. A computer program for simulation of meshing, bearing contact and determination of transmission errors for misaligned gear has been developed. Litvin, Faydor L. and Lee, Hong-Tao Unspecified Center NASA-CR-4259, E-4977, AVSCOM-TR-89-C-014, NAS 1.26:4259, AD-A217853 NAG3-783; DA PROJ. 1L1-62209-A-47-A; RTOP 505-63-51...
