The Experts below are selected from a list of 60 Experts worldwide ranked by ideXlab platform
Zhang Zhi-qiang - One of the best experts on this subject based on the ideXlab platform.
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Finite Elements Analysis(FEA) on the Bending Stress of Double-circular Arc Gear with Different Load-on Ways
New Technology & New Process, 2020Co-Authors: Zhang Zhi-qiangAbstract:From the mathematical model of the double-circular-arc gear teeth Surface at any corner,we establish the model of the double-circular-arc gear with Pro/E,adopting such two different load-on ways as loading merely on the gibbous teeth profile and on both the gibbous teeth profile and the concave teeth profile,finite elements analysis(FEA) is conducted separately to the bending stress of double-circular arc gear,the regularities of distribution of the bending stress of the double-circular-arc gear with different load-on ways are compared.The results will offer reference data for the design and manufacture of the double-circular-arc gear.
He Jing - One of the best experts on this subject based on the ideXlab platform.
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The Analysis and Accurately Modeling of the Double-circular-arc Gear
Journal of Changsha University, 2020Co-Authors: He JingAbstract:From the mathematical model of the double-circulararc gear teeth Surface at any corner,we establish the model of gear fully and accurately with Pro/E,and analyze the mesh and gear-root stress with the model.The model establishes the base for the 3D digital design,analysis of the finity unit,dummy manufacture of the double-circular-arc gear.
Wang Da-peng - One of the best experts on this subject based on the ideXlab platform.
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The Mode and Vibration Response of the Double-Circular-Arc Gears
Journal of Hunan University of Science & Technology, 2020Co-Authors: Wang Da-pengAbstract:The natural frequency and vibration shape of gear influence the process of gear drive and yawp directly. Through applied the mathematical model of the double-circular-arc gear teeth Surface at any corner position, the model of the double-circular-arc gear with high precision and parameter in Pro/E was established. The influence were analgzed that of natural frequency and modal vibration shape by the parameter of the gear, and the vibration response of specifically double-circular-arc gear by Pro/Mechanica. The result indicate that the main vibration direction of double-circular-arc gear is circle. With the tooth count's increase, the influence of the natural frequency at every rand is becoming little stepwise, and the influence of the lower rand natural frequency at the combination about the different tooth count and modulus is smaller, and changing structure change natural frequency obviously. Its vibration response character provides the theory calculate data of wiping off the inner stress of double-circular-arc gear. 8figs, 4tabs,7refs.
T.d. Neshkov - One of the best experts on this subject based on the ideXlab platform.
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Investigation of Contact Fatigue of High Strength Steel Gears Subjected to Surface Treatment
Journal of Materials Engineering and Performance, 2009Co-Authors: L. Dimitrov, D. Michalopoulos, Ch. Alk. Apostolopoulos, T.d. NeshkovAbstract:In this paper the contact fatigue resistance of gearwheel teeth, subjected to shot-peening treatment, was investigated experimentally and analytically. The main objective was the evaluation and prediction of fatigue crack initiation, propagation, direction, and rate. A specially designed experimental rig was used to test a number of spur gears with the following characteristics: (a) unhardened, thermally untreated unpeened Surfaces, (b) thermally treated unpeened Surfaces, (c) unhardened peened Surfaces, and (d) thermally treated peened Surfaces. The theoretical model assumed initiation and propagation of Surface cracks of gears operating in the elastohydrodynamic lubrication regime while loading was due to simultaneous rolling and sliding. Finite element modeling was used for the calculation of the stress field at the gear teeth. Comparison of the experimental and analytical results showed considerable improvement in the contact fatigue strength of thermally treated gear teeth and especially those that underwent shot peening, which increased Surface durability. The residual stresses induced by shot peening are mainly effective in stopping microcrack propagation. When shot peening is applied on thermally untreated gear teeth Surface, it increases the contact fatigue life of the material by 17% at 7 × 10^5 loading cycles. If shot peening is applied on carburized gear teeth Surfaces, it increases the Surface fatigue life by approximately 8% at 10^6 cycles. Contact fatigue and eventual pitting are treated as a normal consequence of the operation of machine elements. To study this failure process different types of testing machines have been designed. The purpose of this paper is the presentation and evaluation of a new design experimental rig for studying contact fatigue damage of gear teeth subjected to different load patterns.
M. Amarnath - One of the best experts on this subject based on the ideXlab platform.
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Experimental investigations to establish correlation between Stribeck curve, specific film thickness and statistical parameters of vibration and sound signals in a spur gear system:
Journal of Vibration and Control, 2014Co-Authors: M. AmarnathAbstract:The use of a gear as a power transmitting machine element in engineering applications is quite extensive. Under service conditions gear teeth contacts have a tendency for deterioration due to contact fatigue, wear, material defects, lubrication failure etc. Gear teeth Surface deterioration triggers several types of failures such as abrasive wear, scuffing, micro pitting and spalling. The abovementioned faults influence the changes in the vibration and sound signals in the gear system. This paper presents the novel results of experimental investigations carried out to assess the Surface fatigue wear in a spur gear system. Estimation of specific film thickness, measurement of reduction in tooth thickness, visual examination of wear mechanisms on the gear teeth and their effects on the statistical parameters of vibration and sound signals are considered in this study. In order to confirm the hypothesis of dependency of Surface fatigue wear, specific film thickness and sound and vibration signals the results ...
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Detection and diagnosis of Surface wear failure in a spur geared system using EEMD based vibration signalanalysis
Tribology International, 2013Co-Authors: M. Amarnath, I. R. Praveen KrishnaAbstract:Abstract Gears are used for transmission of power, motion or both. Under increased power and higher speeds, tribological failures such as scuffing, pitting, mild wear and tooth breakage are of major concern. This paper presents the results of experimental investigations carried out to assess wear in spur gears of a back-to-back gear box under accelerated test conditions. The studies considered the estimation of specific lubricant film thickness and its effects on the fault growth on gear teeth Surface. Ensemble empirical mode decomposition (EEMD) technique is used to extract the fault related features from the vibration signals acquired from the gearbox. The results highlight the advantage of EEMD technique for effective assessment of wear in spurgears.
