Rating Gear Strength

1981 ◽  
Vol 103 (2) ◽  
pp. 516-527 ◽  
Author(s):  
G. Castellani ◽  
V. P. Castelli
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Gear Tooth ◽  
Correction Factors ◽  
Iso Standards ◽  
Gear Teeth ◽  
Root Parameters ◽  
Involute Gear ◽  
Tooth Form ◽  
Internal Gear

Synthetic formulas are written suitable to represent and compare the AGMA and ISO Standards for rating gear tooth strength. The corresponding tooth form and stress correction factors are compared for different kinds of involute gear teeth. A unified procedure is given to enable computing of the root parameters for teeth generated by any kind of tool which completes the ISO method, extending it to the case of shaped teeth. Both AGMA and ISO methods are also applied to the calculation of the aforesaid factors for internal gear teeth. In this case reliability is checked by finite element method. The comparison shows that research is necessary to review some items relating to calculation of stress correction factors.

The Dynamics Analysis of a Multi-Stage Hybrid Planetary Gearing

2012 ◽  
Vol 538-541 ◽  
pp. 2631-2635
Author(s):  
Xin Tan ◽  
Yao Li ◽  
Jun Jie Yang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Gear Tooth ◽  
The Finite Element Method ◽  
Dynamics Model ◽  
Multi Stage ◽  
Body Dynamics ◽  
Multi Body ◽  
Rich Spectrum ◽  
Element Method

This paper introduces a complex multi-body dynamics model which is established to simulate the dynamic behaviors of a multi-stage hybrid planetary gearing based on the finite element method and the software ADAMS. The finite element method is used to introduce deformable ring-gears and sun-gears by using 3D brick units. A whole multi-body dynamics model is established in the software ADAMS. Mesh stiffness variation excitation and gear tooth contact loss are intrinsically considered. A rich spectrum of dynamic phenomena is shown in the multi-stage hybrid planetary gearing. The results show that the static strength of main parts of the gearing is strong enough and the main vibration and noises are excited by the dynamic mesh forces acting on the tooth of planet-gears and ring-gears.

Numerical Experiment on Bend Strength Computation of Profile-Shifted Involute Gear

2011 ◽  
Vol 308-310 ◽  
pp. 1337-1340
Author(s):  
Huo Jie Shi ◽  
Xiang Zhang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Experiment ◽  
Static Analysis ◽  
Similarity Theory ◽  
Regression Equation ◽  
Bend Strength ◽  
Involute Gear ◽  
Set Up ◽  
Element Method

In order to fix on the inner connection of modification coefficient and bend strength, the static analysis of profile-shifted gear is made by applying Finite Element Method, then regression equation that revealed the relation between modification coefficient and bend strength is set up according to the Similarity Theory. Given bend stress of a standard gear, the bend stress of any profile-shifted gear with the same teeth can be calculated from the equation.

Finite element analysis of a cylindrical approach for shrink-fit precision gear forging dies

2003 ◽  
Vol 217 (6) ◽  
pp. 677-685 ◽  
Author(s):  
M A Kutuk ◽  
O Eyercioglu ◽  
N Yildirim ◽  
A Akpolat
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Analytical Approach ◽  
Thick Wall ◽  
The Finite Element Method ◽  
Element Analysis ◽  
Gear Teeth ◽  
Methods Analytical ◽  
Shrink Fit ◽  
Element Method

The design of shrink-fit precision gear forging dies based on strength considerations using an analytical (thick-wall cylinders) approach and the finite element method are compared. While the two methods, analytical and finite element, agree well for the dies with no irregularities (gear teeth), the finite element method predicts much higher stress values than those of the analytical approach for the dies with gear teeth. These high stresses are considerably reduced by reoptimizing the geometric parameters, such as the interference between the die and the ring.

Deformation and Stiffness of Spur Gearing Solved by FEM

2014 ◽  
Vol 611 ◽  
pp. 194-197 ◽  
Author(s):  
Miroslav Malák
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Methods ◽  
Computer Technology ◽  
Spur Gears ◽  
Gear Teeth ◽  
Element Method

Gear teeth are deformed due to the load. Recently, at ever faster evolving computer technology and the available literature, we can encounter modern numerical methods, such as finite element method (FEM), which can serve as methods for the determination of deflection gearing. This paper deals with stiffness and deformation of teeth of spur gears solution by finite element method.

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