Closure to “Discussion of ‘Application of Finite Element Methods to Lubrication: Squeeze Films Between Porous Surfaces’” (1976, ASME J. Lubr. Technol., 98, pp. 179–180)

1976 ◽  
Vol 98 (1) ◽  
pp. 180-180
Author(s):  
B. E. Eidelberg ◽  
J. F. Booker
Keyword(s):  
Finite Element ◽  
Finite Element Methods ◽  
Porous Surfaces

Application of Finite Element Methods to Lubrication: Squeeze Films Between Porous Surfaces

1976 ◽  
Vol 98 (1) ◽  
pp. 175-179 ◽  
Author(s):  
B. E. Eidelberg ◽  
J. F. Booker
Keyword(s):  
Finite Element ◽  
Analytical Solution ◽  
Finite Element Methods ◽  
Fluid Film ◽  
Anisotropic Permeability ◽  
Porous Region ◽  
Porous Surfaces ◽  
Irregular Geometry

Finite element methods are applied to the analysis of squeeze films between porous surfaces. Planar elements in the fluid film region are joined with solid elements in the porous region to ensure continuity of pressures and flows. The formulation is valid for problems with irregular geometry and nonhomogeneous anisotropic permeability. A simple example with uniform properties demonstrates convergence to a previous analytical solution. More complex examples illustrate the power and versatility of the method.

Equilibrium Profile of Modern Belted Radial Ply Tires: Its Determination and Performance Benefits

2013 ◽  
Vol 41 (2) ◽  
pp. 127-151
Author(s):  
Rudolf F. Bauer
Keyword(s):  
Finite Element ◽  
Aspect Ratio ◽  
Finite Element Methods ◽  
Mathematical Analysis ◽  
Internal Stresses ◽  
Stress Concentrations ◽  
Equilibrium Profiles ◽  
Equilibrium Profile ◽  
And Performance ◽  
Beneficial Property

ABSTRACT The benefits of a tire's equilibrium profile have been suggested by several authors in the published literature, and mathematical procedures were developed that represented well the behavior of bias ply tires. However, for modern belted radial ply tires, and particularly those with a lower aspect ratio, the tire constructions are much more complicated and pose new problems for a mathematical analysis. Solutions to these problems are presented in this paper, and for a modern radial touring tire the equilibrium profile was calculated together with the mold profile to produce such tires. Some construction modifications were then applied to these tires to render their profiles “nonequilibrium.” Finite element methods were used to analyze for stress concentrations and deformations within all tires that did or did not conform to equilibrium profiles. Finally, tires were built and tested to verify the predictions of these analyses. From the analysis of internal stresses and deformations on inflation and loading and from the actual tire tests, the superior durability of tires with an equilibrium profile was established, and hence it is concluded that an equilibrium profile is a beneficial property of modern belted radial ply tires.

Finite element methods for internal flow calculations

1983 ◽  
Author(s):  
W. HABASHI ◽  
M. HAFEZ ◽  
P. KOTIUGA
Keyword(s):  
Finite Element ◽  
Finite Element Methods ◽  
Internal Flow
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