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A Parametric Analysis of High-Contact-Ratio Spur Gears
A S L E Transactions, 1976A computer program has been developed to design external spur gears having normal contact ratios (
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Optimization Design of Double-Helical Gear with High Contact Ratio
Applied Mechanics and Materials, 2012Fast Elitist Non-dominated Sorting Genetic Algorithm is introduced in this paper to optimize the performance of double helical gears with high contact ratio.It is effective and timesaving. Numerical examples that illustrate the developed theory are provided.
Ning Zhao, Peng Yuan Qiu, Sheng Wen Hou
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Characteristics of Very High-Aspect-Ratio Contact Hole Etching
Japanese Journal of Applied Physics, 1997An ultrahigh-aspect-ratio, 0.06-µ m-diameter, 2-µ m-deep contact hole pattern of SiO2 was successfully fabricated using a poly-Si mask and a magnetically enhanced reactive-ion-etching (RIE) system in a mixture of CHF3/CO gas. In this dimensional area, processing for vertical profiles is extremely difficult, and problems in the form of ...
Naokatsu Ikegami +3 more
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Load Sharing in High Contact Ratio Truck Transmission Gearing
SAE Technical Paper Series, 1988<div class="htmlview paragraph">A special fixture and test procedure is described which measures gear tooth bending stress in high contact ratio truck transmission spur gearing. A mathematical model which includes the effects of involute profile modifications, spacing variations, crown, and lead variations is described and its results are ...
D. Barnett, A. Agarwal, E. Braun
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Reduction in the Diameter of Contact Holes with a High Anisotropy and Aspect Ratio
ECS Journal of Solid State Science and Technology, 2015SiO2 contact holes with a high anisotropy and aspect ratio were etched using an advanced cyclic etching (ACE) process to reduce the diameters of the contact holes. The ACE process consisted of the pre-deposition of a protection layer on the mask in a C4F6/CH2F2/Ar plasma and a subsequent cyclic process of alternating etching and deposition steps in ...
Sung-Woon Cho +4 more
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Load Sharing and Contact Stress Calculation of High Contact Ratio Internal Spur Gears
2014This paper presents a model of load sharing for high contact ratio internal spur gears, which takes into account the changing rigidity of the pair of teeth along the path of contact. It has been obtained from the minimum elastic potential energy criterion, resulting in a non-uniform load distribution among several tooth-pairs in simultaneous contact ...
M. Pleguezuelos +2 more
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Applied Mechanics and Materials, 2014
The aim of this paper is to determine the effect on direct design asymmetric high contact ratio spur gear based on tooth load sharing. A unique Ansys parametric design language code is developed for this study. The load sharing based bending and contact stresses are determined for different drive side contact ratios. In addition to that the location of
P. Marimuthu, G. Muthuveerappan
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The aim of this paper is to determine the effect on direct design asymmetric high contact ratio spur gear based on tooth load sharing. A unique Ansys parametric design language code is developed for this study. The load sharing based bending and contact stresses are determined for different drive side contact ratios. In addition to that the location of
P. Marimuthu, G. Muthuveerappan
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31st Annual Proceedings Reliability Physics 1993, 1993
The reliability improvement of submicron contacts filled by a blanket tungsten process is studied. It is found that, for contacts with an aspect ratio around 2.0, the contact resistance is initially high and increases drastically with additional heat treatment, finally resulting in open failure.
T. Saito, H. Aoki, T. Tamaru, N. Owada
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The reliability improvement of submicron contacts filled by a blanket tungsten process is studied. It is found that, for contacts with an aspect ratio around 2.0, the contact resistance is initially high and increases drastically with additional heat treatment, finally resulting in open failure.
T. Saito, H. Aoki, T. Tamaru, N. Owada
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International Journal of Mechanical Sciences, 2019
Abstract A new internal gear drive with a high contact ratio (HCR) is presented in this paper. In the new gear drive, the number of teeth working at the same time has reached 7, which is usually only less than 2 in the traditional involute gear drive. The bearing capacity of the new gear is improved significantly.
Yanzhong Wang, Shaoying Ren, Yuan Li
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Abstract A new internal gear drive with a high contact ratio (HCR) is presented in this paper. In the new gear drive, the number of teeth working at the same time has reached 7, which is usually only less than 2 in the traditional involute gear drive. The bearing capacity of the new gear is improved significantly.
Yanzhong Wang, Shaoying Ren, Yuan Li
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Mechanics Based Design of Structures and Machines, 2011
Maximum contact and fillet stresses in normal and high contact ratio spur gears are evaluated based on load sharing ratio using finite element method through single- and multi-point loaded models as well as multi-pair contact model. The multi-pair contact model has been justified as an appropriate one for the present analysis as this model exclusively ...
Rama Thirumurugan, G. Muthuveerappan
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Maximum contact and fillet stresses in normal and high contact ratio spur gears are evaluated based on load sharing ratio using finite element method through single- and multi-point loaded models as well as multi-pair contact model. The multi-pair contact model has been justified as an appropriate one for the present analysis as this model exclusively ...
Rama Thirumurugan, G. Muthuveerappan
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