Download or read book A Predictive Procedure for Wear Pitting and Scoring of Gears Based on Combined Thermal and Mechanical Stresses written by Joselito D. Cariaga and published by . This book was released on 1997 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Predictive Procedure for Wear Pitting and Scoring of Gears Based on Combined Thermal and Mechanical Stresses written by Joselito D. Cariaga and published by . This book was released on 1997 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1998 with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Systematic Analysis of Gear Failures written by Lester E. Alban and published by ASM International. This book was released on 1985-01-01 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explores the detailed steps necessary to determine the causes of failure. First, the physical characteristics of a gear are studied: where the stress points are, from what directions the forces are applied, where the movement of material progresses, and where strain patterns exist. Second, all external conditions and forces are considered. With this background information, a systematic examination is described from beginning to end, the end being a conclusion about the mode and cause of failure.
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1997 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heat Treatment of Gears written by A. K. Rakhit and published by ASM International. This book was released on 2000 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Rakhit wants other engineers to avoid the considerable trouble he had understanding the art of gear heat treatment when he first embarked on a career in gear design and manufacturing. He explains how heat treating and gears made of some kinds of steel gives the gears high geometric accuracy, but can also distort them and raise the cost of manufacturing, so a gear engineer needs to excel in manufacturing, lubrication, life and failure analysis, and machine design as well as design. He presents a case history of each successful gear heat treatment process that provide information on the quality of gear that can be expected with the proper control of material and processes. Annotation copyrighted by Book News Inc., Portland, OR
Download or read book Further Developments of a Predictive Pitting Model for Gears written by Charles Francis Draper and published by . This book was released on 1992 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spur and Bevel Gearing written by Erik Oberg and published by . This book was released on 1914 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Predicted Effect of Dynamic Load on Pitting Fatigue Life for Low contact ratio Spur Gears written by David G. Lewicki and published by . This book was released on 1986 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: How dynamic load affects the surface pitting fatigue life of external spur gears was predicted by using NASA computer program TELSGE. Parametric studies were performed over a range of various gear parameters modeling low-contact-ratio involute spur gears. In general, gear life predictions based on dynamic loads differed significantly from those based on static loads, with the predictions being strongly influenced by the maximum dynamic load during contact. Gear mesh operating speed strongly affected predicted dynamic load and life. Meshes operating at a resonant speed or one-half the resonant speed had significantly shorter lives. Dynamic life factors for gear surface pitting fatigue were developed on the basis of the parametric studies. In general, meshes with higher contact ratios had higher dynamic life factors than meshes with lower contact ratios. A design chart was developed for hand calculations of dynamic life factors. (Author).
Download or read book Metals Abstracts written by and published by . This book was released on 1999-04 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gear Damage Detection Using Oil Debris Analysis written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-19 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this paper was to verify, when using an oil debris sensor, that accumulated mass predicts gear pitting damage and to identify a method to set threshold limits for damaged gears. Oil debris data was collected from 8 experiments with no damage and 8 with pitting damage in the NASA Glenn Spur Gear Fatigue Rig. Oil debris feature analysis was performed on this data. Video images of damage progression were also collected from 6 of the experiments with pitting damage. During each test, data from an oil debris sensor was monitored and recorded for the occurrence of pitting damage. The data measured from the oil debris sensor during experiments with damage and with no damage was used to identify membership functions to build a simple fuzzy logic model. Using fuzzy logic techniques and the oil debris data, threshold limits were defined that discriminate between stages of pitting wear. Results indicate accumulated mass combined with fuzzy logic analysis techniques is a good predictor of pitting damage on spur gears. Dempsey, Paula J. Glenn Research Center NASA/TM-2001-210936, E-12789, NAS 1.15:210936
Download or read book A Rational Procedure for the Preliminary Design of Minimum Volume Gears written by American Gear Manufacturers Association and published by . This book was released on 1992 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: A simple, closed-form procedure is presented as a first step in the design of minimum volume spur and helical gearsets. The procedure includes methods for selecting geometry and dimensions, considering maximum pitting resistance, bending strength, and scuffing resistance. It also includes methods for selecting profile shift.
Download or read book Dynamic Loads on Gear Teeth written by Earle Buckingham and published by . This book was released on 1931 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamental Rating Factors and Calculation Methods for Involute Spur and Helical Gear Teeth written by and published by . This book was released on 1994 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1975 with total page 952 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of the Influence of Micropitting on the Progression of Gear Surface Pitting written by Eunsung Kim and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, the progression of micropitting and its effect on the fatigue life of a spur gear is investigated through an experimental study. Standard contact durability testing is performed on two test gears and an inspection is done throughout the gear's life cycle. Operating conditions for the test are closely controlled to minimize the effect of applied load, lubrication conditions, shaft rotation speed, and temperature on the micropitting behavior. Gear tooth topography is captured using a gear specific CMM and roughness measurement is obtained using a profilometer. Macroscopic images are also taken to have a record of the physical appearance of the gear flank. Using the experimental data, the severity of surface degradation due to micropitting is quantified by measuring the maximum profile deviation from the initial state. Gear tooth surface topography is used in a load distribution prediction. The change in contact stress distribution and maximum contact stress location are compared to the gear tooth surface topography over the life of the gear to study the effect of micropitting. Contact stress data is then applied to a multi-axial fatigue damage model using the critical plane approach to calculate the fatigue damage parameter. The critical plane is determined by testing which candidate plane produces the maximum shear strain amplitude. Stress and strain components on this critical plane are then applied to the fatigue damage model to calculate the predicted number of cycles to failure, and a damage accumulation rule is employed to predict crack initiation. The maximum accumulated damage location closely aligned with the maximum contact stress location as well as the maximum critical-plane shear strain location. Most importantly, these locations corresponded to the pitting location. Based on the experimental and modelled results, micropitting significantly influences the contact stress distribution that leads to stress concentration, potentially leading to contact fatigue failure such as pitting. The fatigue damage prediction model is somewhat validated through the minimal experimental data further experimental data is needed to develop a method of predicting pitting initiation accurately.
Download or read book Analysis of the Effects of Surface Pitting and Wear on the Vibrations of a Gear Transmission System written by and published by . This book was released on 1994 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
