scholarly journals Times Three Dimensional Spur Gear Static Contact Investigations Using Finite Element Method

2016 ◽  
Vol 10 (5) ◽  
pp. 145 ◽  
Author(s):  
Ahmed Mohammed Abdelrhman ◽  
Haidar F. AL-Qrimli ◽  
Husam M. Hadi. ◽  
Roaad K. Mohammed ◽  
Hakim S. Sultan
Keyword(s):  
Finite Element ◽  
Contact Stress ◽  
Gear Tooth ◽  
Three Dimensional ◽  
Element Model ◽  
Spur Gear ◽  
Industrial Applications ◽  
Tooth Surface ◽  
Surface Strength ◽  
Static Contact

<p>A gear is a critical component and can be found in many industrial applications. This investigation develops a three dimensional finite element spur gear model to calculate the contact stress on the gear tooth surfaces. Contact stress is one of the main factors that is used to decide the gears tooth surface strength. In addition there are other important factors such as frictional forces and micro-pits that influence the gear tooth surface. Different analytical techniques have been used to calculate the contact stress of the gear surfaces namely; Hertzian theory and AGMA standards. The analytical results have been compared to the numerical analysis to verify the spur gear finite element model.</p>

Finite Element Analysis for Gear Contact Based on UG and ABAQUS

2013 ◽  
Vol 442 ◽  
pp. 229-232 ◽  
Author(s):  
Li Mei Wu ◽  
Fei Yang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Contact Stress ◽  
Three Dimensional ◽  
Element Model ◽  
Tooth Surface ◽  
Element Analysis ◽  
Tooth Width ◽  
Gear Contact ◽  
Maximum Contact

According to the cutting theory of involute tooth profile, established an exact three-dimensional parametric model by UG. Used ABAQUS to crate finite element model for gear meshing. After simulated the meshing process, discussed the periodicity of the tooth surface contact stress. Based on the result of finite element analysis, made a comparison of the maximum contact stress between finite element solution and Hertz theoretical solution, analyzed the contact stress distribution on tooth width, and researched the effect of friction factor on contact stress. All that provided some theoretical basis for gear contact strength design.

Influence of Different Gear Generation Methods on Contact Stress Analysis of Spur Bevel Gears in PSD

2013 ◽  
Vol 448-453 ◽  
pp. 3476-3480
Author(s):  
Xin Peng Hu ◽  
Jing Wen Yan ◽  
Yan Liu ◽  
Chao Xu ◽  
Ji Xin Wang
Keyword(s):  
Finite Element ◽  
Stress Analysis ◽  
Contact Stress ◽  
Gear Tooth ◽  
Axial Direction ◽  
Element Model ◽  
Bevel Gears ◽  
Power Split ◽  
Curve Method ◽  
Coarse Meshes

This paper summarizes three methods of gear tooth profile generation. Geometry coordinate positions on their profile are compared. A detailed finite element model of mating gear pairs, containing fine meshes and coarse meshes, is presented. Contact stress analysis of three finite element models are conducted to investigate the influence of different generation methods on contact stress. Then, a spur bevel gears pair in Power Split Device is generated by CATIA Law Curve method, and contact stress under the special operating condition is analyzed. The results show few differences of three methods in geometry coordinate positions and tooth contact stress, and the displacement of spur bevel gear in axial direction may cause uneven stress distribution.

Contact Stress Evaluation of Involute Gear Pairs, Including the Effects of Friction and Helix Angle

2015 ◽  
Vol 137 (4) ◽  
Author(s):  
Santosh S. Patil ◽  
Saravanan Karuppanan ◽  
Ivana Atanasovska
Keyword(s):  
Finite Element ◽  
Friction Factor ◽  
Contact Stress ◽  
Three Dimensional ◽  
Helix Angle ◽  
Spur Gear ◽  
Helical Gear ◽  
Contact Stresses ◽  
Fe Model ◽  
3D Finite Element Method

The aim of this technical brief is to provide a new viewpoint of friction factor for contact stress calculations of gears. The idea of friction factor has been coined, for the calculation of contact stresses along the tooth contact for different helical gear pairs. Friction factors were developed by evaluating contact stresses with and without friction for different gear pairs. In this paper, three-dimensional (3D) finite element method (FEM) and Lagrange multiplier algorithm have been used to evaluate the contact stresses. Initially, a spur gear finite element (FE) model was validated with the theoretical analysis under frictionless condition, which is based on Hertz's contact theory. Then, similar FE models were constructed for 5 deg, 15 deg, 25 deg, and 35 deg helical gear pairs. The contact stresses of these models were evaluated for different coefficients of friction. These results were employed for the development of friction factor.

Strength Evaluation of Polymer Composite Spur Gear by Finite Element Analysis

2008 ◽  
Author(s):  
Mohammad Robiul Hossan ◽  
Zhong Hu
Keyword(s):  
Finite Element ◽  
Polymer Composite ◽  
Volume Fraction ◽  
Gear Tooth ◽  
Axial Stress ◽  
High Stress ◽  
Element Model ◽  
Simulation Method ◽  
Spur Gear ◽  
Element Analysis

Modern advanced polymer composite materials have opened a new level of noiseless, lubricant free, high resilience and precision gearing in power and motion transmission. The proper understanding and evaluation of gear strength and performance is an important prerequisite for any reliable application. In this paper, a 20% short glass fiber reinforced nylon66 spur gear fabricated by injection molding has been carefully investigated. A three-dimensional finite element model was used to simulate the multi-axial stress-strain behaviors of a gear tooth under the dynamic load for a complete working cycle with a special geometry, operating condition, fiber orientation and volume fraction. The strength of composite gears has been compared with isotropic un-reinforced nylon66 and steel gears. The tooth root region of a gear which usually experiences high stress and potential to failure has been carefully investigated. This computer simulation method can be used as a useful tool for evaluating strength and predicting failure of the polymer composite gears.

scholarly journals Contact Stress Analysis of Spur Gear Under the Different Rotational Speed by Theoretical and Finite Element Method

2018 ◽  
Vol 7 (4) ◽  
pp. 213 ◽  
Author(s):  
Jwan Kh. Mohammed ◽  
Younis Kh. Khdir ◽  
Safeen Y. Kasab
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Dynamic Analysis ◽  
Stress Analysis ◽  
Contact Stress ◽  
Rotational Speed ◽  
Three Dimensional ◽  
Spur Gear ◽  
Percentage Error ◽  
Element Method

In this study that spur gears are chosen, contact stress of spur gear is presented under the effect of rotational speed. Three-dimensional simulation of dynamic analysis of gears designed and modeled using ANSYS software. The dynamic analysis included in the determination of dynamic stresses analysis. Contact stress is theoretically calculated and analyzed and numerically estimated using both Hertzian mathematical model and finite element method respectively. Different values of rotational speed used to study its effect on contact stress. Both methods compared by evaluating the percentage error of contact stress, and the modeling of the spur gear and stress analysis of spur gear carried out using SOLID WORK and ANSYS V14, respectively. The most significant note in this study concludes that increasing speed causes vibration and pitting failure due to repetitions.

scholarly journals Analysis of Tooth Surface Contact Stress of Involute Spur Gear

2021 ◽  
Vol 2133 (1) ◽  
pp. 012037
Author(s):  
Yusheng Zhai ◽  
Jie Mu ◽  
Ruiguang Yun ◽  
Siran Jia ◽  
Jianfeng En ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Contact Stress ◽  
Simulation Analysis ◽  
Spur Gear ◽  
Tooth Surface ◽  
Analysis Model ◽  
Element Analysis ◽  
Element Simulation ◽  
Surface Contact

Abstract Through the establishment of a pair of spur gear contact models, based on Hertz contact theory, the tooth surface contact stress is calculated; then the Ansys finite element analysis software is used to simulate and analyse the stress distribution. Through the analysis and comparison of the two results, it is proved that the contact stress calculated by Hertz theory is relatively small, which is close to the results of the finite element simulation analysis. Theoretical calculation can verify the accuracy of the finite element simulation analysis model, and the finite element simulation analysis provides an effective way to accurately calculate the contact stress of the tooth surface.

Comparison of Bending Stress of a Spur Gear for Different Materials and Modules Using AGMA Standards in FEA

2013 ◽  
Vol 739 ◽  
pp. 382-387 ◽  
Author(s):  
S. Prabhakaran ◽  
S. Ramachandran
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Three Dimensional ◽  
Element Model ◽  
Spur Gear ◽  
Spur Gears ◽  
Element Analysis ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element ◽  
Element Method

Gearing is one of the most critical components in mechanical power transmission systems.. This paper explains about the comparison of the geometry of spur gears for two different modules by modeling and mathematical equations, load distribution at various positions of the contact line and the stress analysis of spur gears using three-dimensional finite element method. The bending stresses were examined using three-dimensional finite element model.. These stresses of different modules obtained from the finite element analysis were compared and the considerable reduction of weight occurred was found and also the values are compared with the theoretical values. Both results agree very well. This indicates that the finite element method model is accurate.

Finite Element Simulations of the Sinus Lifting Process

2011 ◽  
Vol 421 ◽  
pp. 350-353
Author(s):  
Ching Chieh Huang ◽  
Li Wen Chen ◽  
Nan Ming Yeh ◽  
Dong Feng Wu ◽  
Yung Chuan Chen
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Contact Stress ◽  
Three Dimensional ◽  
Element Model ◽  
Finite Element Simulations ◽  
Sinus Lift ◽  
Rounded Corner ◽  
Sinus Lifting ◽  
Sinus Membrane

In the current market, the rotary sinus lift approach is developed by many manufacturers to substitute for the traditional osteotome technique. Sinus lift surgery can be achieved safely and accurately by using the rotary sinus lift approach. In this study, a three-dimensional elastic-plastic finite element model is used to simulate the contact stress between the sinus membrane and the sinus lift approach during sinus lifting process. Three different shape designs of the rotary sinus lift approach are explored. The results showed that the lift approach type A (flat top rounded corner shape) offers less damage and a higher lifting displacement of the sinus membrane during sinus lifting process.

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