Contact stress analysis of involute spur gear by finite. Contact stress and shear stress analysis of spur gear using. Focus of the work stress analysis such as prediction of contact stress and. Static analysis of bending stresses on spur gear tooth. The picture on the cover page shows the contact stress distribution over a crowned spur gear tooth. Bending stress model with mesh for spur gear of module 5. Load sharing analysis of highcontactratio spur gears in military tracked vehicle applications m. Load sharing analysis of highcontactratio spur gears in. In order to perform contact analysis while meshing the gear and the pinion, the geometrical shape of the meshing gear and pinion needs to be modeled. What horsepower input can be used with this gearset if the contact stress is limited to 100 kpsi. Spur gear is a simplest type of gear having its teeth cut parallel to the axis of shaft on which the gear is mounted.
The main factors that cause the failure of gears are the bending stress and contact stress of the gear tooth. Finite element analysis of spur gear a thesis submitted for the degree of master of engineering by research by gagandeep singh february 2017. Contact stress analysis of spur gear to optimize mass or. This study utilizes a twodimensional finite element model to calculate the contact stress in a pair of mating spur gears. Spur gears mechanical engineering mcq questions and. A pair of teeth in action is generally subjected to contact stresses causing fatigue failure of gear tooth.
For contact stress analysis hertzian equation is used and for. At first, a spur gear with perfect involute is modeled using a 3d cad software. During stress analysis by ansys, the desired constraints and loads were applied to obtain the distribution of bending stresses along the contact line of action. Out of these, failure of gears due to contact stress is high compared to bending stress. In detail study of the contact stress produced in the mating gears is the. This paper analyses the bending stresses characteristics of an involute spur gear tooth under static loading conditions.
Spur gears mechanical engineering mcq questions and answers home category mechanical engineering mcq questions and answers spur gears 1 which of the following gear tooth failures isare induced when maximum hertz contact stress on gear tooth surface exceeds surface endurance strength of tooth. Pdf frictional contact stress analysis of spur gear by. Gopinath nomenclature a addendum of gear tooth b face width cr contact ratio f t tangential force g r gear ratio. This approach presumes that the load is uniform distributed along the tooth face on a. The contact stress can calculate by analytical method using hertzs contact stress theory for different value of module. Stress analysis has been a key area of research to minimize failure of the gear and optimize the design. Ansys, contact stress, finite element analysis, spur gear. Procedure for tooth contact analysis of a face gear meshing. Home category mechanical engineering mcq questions and answers spur gears. The main factors that cause the failure of gears are the bending stress an d contact stress of the gear tooth. In this thesis, contact stress analysis of spur gear is studied using finite element analysis. The meshing of the gear with pinion of module 6 is shown in figure1 using ansys. This kind of stress may not be significant most of the time, but may cause. The study of contact stress developed between the mating gears are very important for the gear design.
Fea co ntact stress value of spur gear for module 6. Finite element analysis of spur gear a thesis submitted for the degree of master of engineering by research by. Contact stress analysis of spur gear for different. This paper present the contact stress analysis and bending stress analysis of spur gear by analytical method. Stress analysis has been a key area of research to minimize failure and optimize design. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Contact stress analysis of stainless steel spur gears using. This paper presents a contact stress analysis for a pair of mating gears during rotation. Contact mechanics in gears a computeraided approach for analyzing contacts in spur and. Pdf in this paper, the main purpose is first, to determine contact stress on involute spur gear teeth by using analytical and numerical approaches and. Spur gear tooth stress analysis and stress reduction. Force analysis for spur gears equation and calculator.
Prabhakar purushothaman emphases on the contact stress. View contactstressanalysisofspurgeartooptimizemassorweightusingfeatechniques. Contact stress analysis of stainless steel spur gears. Pdf contact stress analysis of spur gear teeth pair. Each case shows that s equence position of contact stress between these two teeth. Contact stress analysis of a helical gear scientific. Tutorial on hertz contact stress university of arizona. As a result, based on this finding if the contact stress minimization is the primary concern and if the large power is to be transmitted then a spur gear with higher module is preferred. Mohanty department of mechanical engineering national institute of technology rourkela 20082009. Here in, we report the contact stress analysis of stainless steel spur gears by theoretical method using hertz equations and by finite element analysis using fea. The bending stress model with mesh in fea for module 5 for threedimensional tooth profile is shown in figure3. Static contact stress analysis of a spur gear tooth using.
The main objective of this study is to add different shaped holes to reduce stress concentration. Spur gear is most basic gear used to transmit power between parallel shafts. Join the grabcad community today to gain access and download. Preman reynold joseph 1 in which the contact stresses of gears is found out by ansys and hertz equation which is for finding contact stress in gears. In this paper the contact stress in rollingsliding contact of involute spur gear and the effect of coefficient of friction was analyzed. This paper gives a finite element model for investigation of the stresses in the tooth during the meshing of gears for material steel 15ni2cr1mo28.
The study in this paper shows that the complex design problem of spur gear which requires. Introduction 1 gear is a rotating cylindrical wheel having teeth cut on it and which meshes with another toothed part to transmit the torque or power. I tried to simulate spur gear using stuctural analysis in ansys 19. For research purpose selecting one spur gear train for contact stress analysis. The material of the gear and pinion is steel 15ni2cr1mo28.
Contact stress analysis of spur gear teeth pair citeseerx. Frictional contact stress analysis of spur gear by using finite element method article pdf available in applied mechanics and materials 772. Deformation of the gear is also another key parameter which is to be considered. This phase they induce high stress at the point of contact. There are two methods for analyzing the stress generated in meshing gear teeth through finite element analysis. Contact stress analysis in a spur gear assembly grabcad. In this paper an attempt has been made to study the contact stresses of a pair of mating gear teeth, under static conditions, by using a twodimensional finite element method and. Static contact stress analysis of a spur gear tooth using the.
I already calculated contact stress between spur gear using agma equation and hertz equation. They have straight teeth, and are mounted on parallel shafts. The contact stresses can also calculated by fea method. M r tyagi, analysis of stresses and deflections in spur gear, international journal of mechanical engineering and technology, 84, 2017, pp. In both cases, we are interested in the tooth load, which we got from the torque, t. International journal of engineering research and general. View contact stress analysis of spur gear tooptimizemassorweightusingfeatechniques. The results obtained from finite element analysis fea are compared with theoretical hertzian equation values.
Gear design and engineering machine design and application. The value of contact stress is very important, as the stress value changes with contact area. Contact stress distribution plot of spur gear for module 6. Pdf analysis of surface contact stress for a spur gear. Spur gear generally fails by bending failure or contact failure.
The current goal is that the finite element analysis of the bevel gear is performed to. Ali raad hassan, contact stress analysis of spur gear teeth pair, world academy of science, engineering and technology 58, 2009, pp. Spur gear, contact stress, hertz equations, ansys 14. Pdf contact stress analysis of spur gear teeth pair researchgate. This video lecture will teach you how to design spur gears for mechanical strength, dynamic load and surface durability. Procedure for tooth contact analysis of a face gear. Contact stress analysis for a pair of mating gears.
This analysis is used to obtain the contact stress values for the above profile. Jan 16, 20 this video lecture will teach you how to design spur gears for mechanical strength, dynamic load and surface durability. Iupital has good strength, durability, wear resistance, and chemical resistance, so can be used to each gear. Spur gear, involute profile, bending stresses, deflection and finite element analysis. Gear wreck will happen because of its tooth fatigue and tooth surface wear, so strength design from both side is necessary. For the analysis, steel and grey cast iron are used as. Spur gear spur gears are the most common type of gears. The value of contact stress is very important, as the stress value changes with.
A pair of spur gear tooth in action is generally subjected to two types of cyclic stress, contact stress and bending stress including fatigue. Bending stress, contact stress, gear analysis using, ansys work bench, static load introduction due to globalization industries are facing competition. Analysis of spur gear is done by vivek karaveer, ashish mogrekar and t. A finite element model of spur gear with a segment of three teeth is considered for analysis and stress concentration reducing holes of various sizes are introduced on gear teeth at various locations.
The first is to apply the concentrated load at the load position directly. The contact stress in the mating gears is the key parameter in gear design. Spur gear contact stress analysis and stress reduction by. Herein, we report the contact stress analysis of stainless steel spur gears by theoretical method using. The spur gear is sketched and modelled in ansys design modeller and the contact stress analysis is done in mechanical ansys multiphysics. It is difficult to validate these design procedures with strain gages because face gear teeth are very small. Contact stress and shear stress analysis of spur gear using ansys and theoretical international journal of modern studies in mechanical engineering ijmsme page fig9. The use of different materials in gear manufacturing provides a range of contact stresses and shear stress. To compare the static transmission errors of slandered and modified profile of the gear teeth. Power and torque is transmitted when a tooth of an input gears exerts a force f n along the pressure line on the tooth of output gear see figure a. Contact stress analysis of composite spur gear using photo. Citeseerx contact stress analysis of spur gear teeth pair. Contact stress analysis between two spur gear teeth was considered in different contact positions, representing a pair of mating gears during rotation. The crucial requirement of effective power transmission in various machines, automobiles, elevators, generators, etc has created an increasing demand for more accurate analysis of the characteristics of gear systems.
A gearset has a diametral pitch of 5 teethin, a 20 degree pressure angle, and a 24tooth cast iron spur pinion driving a 48tooth cast iron gear. Abstract the contact stress and bending stress in mating gears is the key parameter in gear design. This paper gives a finite element model for introspection of the stresses in the tooth during the meshing of. A programme has been developed to plot a pair of teeth in contact. Stress analysis has been a key area of research to minimize failure and optimize desi gn. To achieve this, first, three dimensional involute spur gear pairs were developed in solid works 2012 premium and the 3d model was exported to ansys workbench 14. The bending stress has to be analyzed by means of analytical and fea method.
Contact stress and bending stress analysis of spur gear by. Force analysis spur gears equation and calculator engineers. In addition to delivering a computer based tool for analyzing contact mechanics in gears the project has also attempted to answer the following questions. Next, the analysis was done using both fem and hertizian stress formula. N karthik bommisetty abstract a finite element procedure has been developed in this work to determine the load distribution factor, km, of the agma formula for a set of spur gear. Contact stress and shear stress analysis of spur gear. Introduction it is widely agreed that both experimental and theoretical analysis of spur gears can be performed using a 2d approach. Pdf contact stress analysis between two spur gear teeth was considered in different contact positions, representing a pair of mating gears.
Spur gears mechanical engineering mcq questions and answers. This approach presumes that the load is uniform distributed along the tooth. Contact stress analysis of spur gear for different materials. Contact stress analysis and optimization of bevel gear. In this paper, the contact stress analysis of stainless steel spur gear by theoretical method using hertz equation and finite element analysis using ansys 16. In this study pinion rotation from first contact point to last contact point to produce 4 cases. Stress analysis on spur gears using ansys workbench 16. Spur gear tooth stress analysis and stress reduction v. Stress analysis spur gear design by using ansys workbench. The existing design methods for face gear tooth stresses are simple modifications of spur gear stress analysis programs. Stresses on spur gear teeth the two primary failure modes for gears are. Contact stress analyses for spur and helical gears are performed between two gear teeth at different.
Gears generally fail when the working stress exceeds the maximum stress. The literature available on gear tooth contact stress problems is not very extensive and that available does not explain the method by which analysis was carried out. To generate the profile of spur gear teeth and calculate of gear bending stress using lewis equation and hence check the feasibility of modified gear profile. Highest and lowest points of singletooth contact in spur gears. Abstractcontact stress analysis between two spur gear teeth was considered in different contact positions, representing a pair of mating gears during rotation. Pdf contact stress analysis of composite spur gear using. Load sharing analysis of high contact ratio spur gears in military tracked vehicle applications m. Contact stress analysis of spur gear for different materials using ansys and hertz equation.
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