FINITE ELEMENT ANALYSIS OF THE THERMAL BEHAVIOUR OF SINGLE-DISC CLUTCHES DURING REPEATED ENGAGEMENTS

Tribologia ◽  
2016 ◽  
Vol 266 (2) ◽  
pp. 9-24 ◽  
Author(s):  
Oday I. ABDULLAH ◽  
Laith Abed SABRI ◽  
Wassan S. Abd Al-SAHB
Keyword(s):  
Finite Element ◽  
Thermal Behaviour ◽  
Thermal Stresses ◽  
Three Dimensional ◽  
Finite Element Models ◽  
Element Analysis ◽  
Premature Failure ◽  
Friction Clutch ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

Most of the failures in the sliding systems occur due to the high thermal stresses, which generated at the interface between the contacting surfaces due to sliding between parts, such as friction clutches and brakes. In this paper, the thermal behaviour of a single-disc clutch is investigated. The surface temperatures of the friction clutch disc will be increased during repeated engagements, in some cases, will lead to premature failure of the clutch disc. In order to avoid this kind of failure, it the surface temperature should be calculated with high accuracy to know the maximum working temperature of the friction system. In this work, the temperature distributions are computed during four repeated engagements at regular intervals (5 s) for the same energy dissipation. Three-dimensional finite element models are used to simulate the typical friction clutch disc.

Three-Dimensional Finite Element Calculations of Thermal Stresses in Patterned GaAs / Si

1991 ◽  
Vol 239 ◽  
Author(s):  
E. H. Lingunis ◽  
N. M. Haegel ◽  
N. H. Karam
Keyword(s):  
Finite Element ◽  
Thermal Stresses ◽  
Stress Measurement ◽  
Three Dimensional ◽  
Biaxial Stress ◽  
Luminescence Spectra ◽  
Element Analysis ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element ◽  
Free Edges

ABSTRACTThree-dimensional elastic finite element analysis was used to investigate the stress state in patterned GaAs/Si squares with different width to thickness ratios. Quantitative results for stress relief close to free edges were obtained. Features not revealed by previous two-dimensional calculations show the necessity of the three-dimensional treatment. For large areas the calculations give an approximately uniform biaxial stress everywhere, with reduced magnitude close to free edges. This allows for straightforward interpretation of high spatial resolution luminescence spectra and precise stress measurement. Experimental results from low temperature photoluminescence show good agreement with the calculated stresses. Finally, the effects of adjacent layers of different materials on the stress in epitaxial semiconductor thin films is investigated (particularly the case of InP/GaAs/Si) and discussed in conjunction with previous results.

Computer Graphics for 3-D Finite Element Models

1974 ◽  
Vol 96 (3) ◽  
pp. 200-206 ◽  
Author(s):  
L. W. Kirchhoff
Keyword(s):  
Finite Element ◽  
Computer Graphics ◽  
Three Dimensional ◽  
Analysis Data ◽  
Finite Element Models ◽  
Element Analysis ◽  
General Line ◽  
Dimensional Finite Element ◽  
Hidden Line ◽  
Three Dimensional Finite Element

A description is given of a computer graphics program for detecting errors in three-dimensional finite element models and reducing finite element analysis data to a usable form. An efficient hidden line algorithm for mixed sets of polygons and polyhedra is presented together with a general line classification scheme. They are used to produce the variety of plots necessary to detect errors in the model. They also provide an “uncluttered” surface for displaying stress, temperature, and displacement data.

Semi-Automated Hexahedral Mesh Generation of Human Vertebrae by Isoparametric Mapping

2008 ◽  
Author(s):  
Yifei Dai ◽  
Glen L. Niebur
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Spinal Instrumentation ◽  
Stress Shielding ◽  
Finite Element Models ◽  
Hexahedral Mesh ◽  
Element Analysis ◽  
Dimensional Finite Element ◽  
As Stress ◽  
Three Dimensional Finite Element

Subject-specific finite element models provide a means to explore inter-subject biomechanical variations, and have been widely used in the study of spinal fusion such as stress-shielding due to spinal instrumentation [1], and to assess biomechanical response to aging and disease [2–4]. Three-dimensional finite element models of vertebrae are usually constructed from CT scans. However, manual generation of meshes is labor intensive. As such, techniques that simplify creation of meshes are needed to make finite element analysis more feasible for large biomechanical studies and clinical applications.

Finite Element Analysis of Nonuniformity of Tires with Imperfections5

2007 ◽  
Vol 35 (3) ◽  
pp. 226-238 ◽  
Author(s):  
K. M. Jeong ◽  
K. W. Kim ◽  
H. G. Beom ◽  
J. U. Park
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Element Model ◽  
Radial Force ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Dimensional Finite Element ◽  
Force Variation ◽  
Three Dimensional Finite Element

Abstract The effects of variations in stiffness and geometry on the nonuniformity of tires are investigated by using the finite element analysis. In order to evaluate tire uniformity, a three-dimensional finite element model of the tire with imperfections is developed. This paper considers how imperfections, such as variations in stiffness or geometry and run-out, contribute to detrimental effects on tire nonuniformity. It is found that the radial force variation of a tire with imperfections depends strongly on the geometrical variations of the tire.

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