An Experimental Study of the Influence of Mounting Errors on the Load Distribution Along the Face Width in a Spur Bevel Gear

Author(s):  
Viktor Ivanov ◽  
Svitlana Ivanova ◽  
Galyna Urum ◽  
Dmytro Purich
2013 ◽  
Vol 307 ◽  
pp. 304-307 ◽  
Author(s):  
Aref Bahramighahnavieh ◽  
Peiman Mosaddegh ◽  
Saleh Akbarzadeh

In this paper, a model has been developed for calculating the Hertzian stress distribution of straight bevel gear. One pair of straight bevel gear teeth replaced with multiple pairs of spur gear teeth by using Tredgold approximation. The transmitted load and radii of curvature are evaluated and used to determine the stress distribution. The results show that these stresses are constant along the face width of tooth. Moreover, the magnitude of theses stresses are in good agreement with the simulation results using commercial ABAQUS software


Author(s):  
Carlos H. Wink

In this study, tooth root stresses of helical gear pairs with different combinations of face width increase and offsets were analyzed. Contact face width was kept constant. The variables studied were face width and gear faces offset. The well-known LDP – Load Distribution Program was used to calculate tooth root stresses using a finite element model. The results presented show that the face width increase and offset have a significant influence on tooth root stresses. In some cases, increasing face width of one gear pair member resulted in significant increase of tooth root stress of the other member. For gear pairs with unequal and offset face widths, tooth root stresses were mostly affected when face widths were increased to the same direction of the contact line travel direction.


2019 ◽  
Vol 6 (1) ◽  
pp. 310-328
Author(s):  
Dr. Bodzás Sándor

The aim of this publication is the designing and the CAD modelling of the Gleason – type bevel gear pair and the analysis of the connecting teeth in case of different load moments. The main properties of this gear pair are the changing whole depth along the face width and the circular tooth direction which is created by a complicated cutting tool. Cutting edges are situated along the perimeter of the middle circle by equal circular pitches on the cutting tool. After the creation of the CAD model, which could be created by numerical way, TCA could be done in the function of the moment changing. The normal stress, normal elastic strain and normal deformation will be analyzed on the surface of the driven gear perpendicularly for the tooth surface. Knowing of the results correlations will be visualized based on the TCA results and the load moments. The behavior of the contact teeth will be analyzed.


Author(s):  
M. A. Hotait ◽  
D. Talbot ◽  
A. Kahraman

In this study, combined influence of shaft misalignments and gear lead crown on the load distribution and tooth bending stresses is investigated experimentally. A set of helical gear pairs having various amounts of lead crown was tested under loaded, low-speed conditions with varying amounts of tightly-controlled shaft misalignments. Gear teeth were instrumented through strips of strain gauges along the face width of gears at the tooth fillet region near the start of active profile. Variations of root strains along the face width were recorded for different levels of shaft misalignments and gear lead crown. At the end, the experimental results were correlated to the predictions of a gear load distribution model and recommendations were made on how much lead crown is optimal for a given misalignment condition.


2017 ◽  
Vol 20 (3) ◽  
Author(s):  
Elaine Cristina Sousa Dos Santos ◽  
Diego Jesus Bradariz Pimentel ◽  
Laís Lopes Machado De Matos ◽  
Laís Valencise Magri ◽  
Ana Maria Bettoni Rodrigues Da Silva ◽  
...  

<p><strong>Objective: </strong>To compare the proportion and linear measurement indexes between Brazilian and Peruvian population through 3D stereophotogrammetry and to stablish the face profile of these two Latin American populations. <strong>Material and Methods: </strong>40 volunteers (Brazilian n=21– 10 males and 11 females; Peruvian n=19 – 8 males and 11 females) aged between 18 and 40 years (mean of 28.7±9.1) had landmarks marked on the face. Then, 3D images were obtained (VECTRA M3) and the indexes of proportion and linear measurement (face, nose, and lips) were calculated. The data were statistically analyzed by One-Way ANOVA (p&lt;0.05). <strong>Results: </strong>The proportion indexes did not reveal marked differences either between the studied populations or genders (p&gt;0.05). The following linear measurements showed intergroup statistically significant differences: face width and height, nose width and height, upper facial height, mouth width, protrusion of the nose tip (p&lt;0.05). The Brazilian females showed the smallest significant differences. <strong>Conclusions: </strong>Despite the different ethnic compositions, the Brazilian and Peruvian populations did not differ regarding the proportions of the face, nose, and lips. The differences observed in Brazilian females may be related to gender and/or to the Caucasian heritage of the Brazilian sample.</p><p><strong>Keywords</strong></p><p>Photogrammetry; Face; Tridimensional Image.<strong></strong></p>


1985 ◽  
Vol 75 (5) ◽  
pp. 686-691 ◽  
Author(s):  
Larry S. Nichter ◽  
Peter C. Haines ◽  
Milton T. Edgerton

Author(s):  
Kouitsu Miyachika ◽  
Satoshi Oda ◽  
Hiroshige Fujio

Abstract This paper presents a study on effects of the case depth, the case-hardened part, the face width, the rim thickness and the standard pressure angle on residual stresses of case-hardened gears. A heat conduction analysis and an elastic-plastic stress analysis for the case-hardening process of spur gears were carried out by the three-dimensional finite-element method (3D-FEM), and then residual stresses were obtained. It was found that the compressive residual stress σ*θ = 30° at Hofer’s critical section of the end of the face width is smaller in magnitude than that of the middle of the face width, and that the absolute value of σ*θ = 30° of the middle of the face width decreases owing to case-hardening the gear-side and the decreasing rate increases with an increasing case depth and a decreasing face width.


2019 ◽  
Vol 22 ◽  
Author(s):  
Ana M. Beltrán-Morillas ◽  
Inmaculada Valor-Segura ◽  
Francisca Expósito

AbstractInterpersonal transgressions often threaten the stability of the relationship. Within the scope of romantic relationships, physical violence and sexual infidelity have been considered the most difficult transgressions to forgive. Similarly, two variables considered relevant for forgiveness within the context of the couple are partner-specific dependency and the guilt experienced by the offended person. In that way, this research aims to approach the understanding of the forgiveness process of such transgressions. To this end, an experimental study was designed (N= 173 university women;Mage= 21.36,SD= 2.83), by which three indicators of forgiveness corresponding to the Transgression-Related Interpersonal Motivations Scale–18–Item Form (TRIM–18; “Revenge”, “Avoidance” and “Benevolence”), partner-specific dependency and sense of guilt of the offended person were examined in the face of the transgressions of physical violence and sexual infidelity. Results revealed that violence (vs. infidelity) is less forgiven (higher “Revenge”,p= .017, ηp2= .034). In addition, the results showed that high partner-specific dependency leads to further guilt which, in turn, leads to greater forgiveness towards the partner (less “Avoidance”,CIE= –.094,SE= .042, 95% CI [–.201, –.029]; and higher “Benevolence”,CIE= .080,SE= .037, 95% CI [.024, .173]) in light of violence (vs. infidelity). Last but not least, the previous findings and their possible implications for romantic relationships are discussed.


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