Stability Study of a Tapered Rotating Sandwich Beam with Asymmetric Configuration and Variable Temperature Gradient Under Dynamic Condition

2020 ◽  
pp. 297-309
Author(s):  
M. Pradhan ◽  
P. R. Dash
Keyword(s):  
Temperature Gradient ◽  
Dynamic Condition ◽  
Variable Temperature ◽  
Sandwich Beam ◽  
Stability Study ◽  
Asymmetric Configuration

Stability of an exponentially tapered asymmetric sandwich beam placing on a variable Pasternak Foundation with variable temperature gradient

2020 ◽  
pp. 095745652097237
Author(s):  
Madhusmita Pradhan ◽  
Pusparaj Dash ◽  
Dipesh Kumar Nayak
Keyword(s):  
Mathematical Modeling ◽  
Temperature Gradient ◽  
Variable Temperature ◽  
Complete Solution ◽  
Equations Of Motion ◽  
Sandwich Beam ◽  
Pasternak Foundation ◽  
Buckling Loads ◽  
The Stability ◽  
Hill’S Equations

The stability investigation of an exponentially tapered sandwich beam, asymmetric in nature placed upon a Pasternak foundation with variable behavior acted upon by a periodic longitudinal load with variable temperature grade with clamped-pinned condition provided at the ends is analyzed in this article. By using Hamilton’s energy method, a complete solution for the mathematical modeling of the system is obtained. The equations of motion along with the related boundary conditions are obtained in non-dimensional form. A group of Hill’s equations are found by generalized Galerkin’s method. Different parameters have significant influence on both the static buckling loads as well as the zones of instability. These effects of these parameters are examined and are presented in a graphical manner. The outcomes resulted due to uniform and variable temperature grade are compared.

Analytical Solutions and Derivation of Relative Permeabilities for Water-Heavy Oil Displacement and Gas-Heavy Oil Gravity Drainage Under Non-Isothermal Conditions

2016 ◽  
Vol 19 (01) ◽  
pp. 181-191 ◽  
Author(s):  
F. J. Argüelles-Vivas ◽  
T.. Babadagli
Keyword(s):  
Temperature Gradient ◽  
Relative Permeability ◽  
Heavy Oil ◽  
Variable Temperature ◽  
Spontaneous Imbibition ◽  
Analytical Models ◽  
Gravity Drainage ◽  
Positive Temperature ◽  
Relative Permeability Curves ◽  
Isothermal Gas

Summary Analytical models were developed for non-isothermal gas/heavy-oil gravity drainage and water-heavy oil displacements in round capillary tubes including the effects of a temperature gradient throughout the system. By use of the model solution for a bundle of capillaries, relative permeability curves were generated at different temperature conditions. The results showed that water/gas-heavy oil interface location, oil-drainage velocity, and production rate depend on the change of oil properties with temperature. The displacement of heavy oil by water or gas was accelerated under a positive temperature gradient, including the spontaneous imbibition of water. Relative permeability curves were greatly affected by temperature gradient and showed significant changes compared with the curves at constant temperature. Clarifications were made as to the effect of variable temperature compared with the constant (but high) temperatures throughout the bundle of capillaries.

Fractionation of polyolefins in a column with a variable temperature gradient

1972 ◽  
Vol 14 (3) ◽  
pp. 808-812 ◽  
Author(s):  
A.A. Buniyat-Zade ◽  
Ye.A. Osipov ◽  
A.B. Azimova
Keyword(s):  
Temperature Gradient ◽  
Variable Temperature

Vortex dynamics during N–S and S–N transitions of Y–Ba–Cu–O superconductors under the effect of temperature gradient and thermal cycling

1997 ◽  
Vol 12 (11) ◽  
pp. 3090-3098 ◽  
Author(s):  
I. Kirschner ◽  
A. C. Bódi ◽  
R. Laiho ◽  
L. Lähderanta
Keyword(s):  
Temperature Gradient ◽  
Physical Environment ◽  
Variable Temperature ◽  
Ac Susceptibility ◽  
Vortex Motion ◽  
Effect Of Temperature ◽  
One Dimensional ◽  
Nonequilibrium Temperature ◽  
The One ◽  
Flux Expulsion

AC susceptibility of ac has been measured simultaneously in three different ranges of Y–Ba–Cu –O ceramic samples in the presence of a large and variable temperature gradient. The results obtained for normal-superconducting or superconducting-normal transitions under the effect of the one-dimensional nonequilibrium temperature distribution reveal the vortex motion to consist of not only conventional flux expulsion (or flux penetration), but flux exchange too, appearing between different ranges of samples and between samples and their close physical environment. The thermal cycles are shown to represent a supplementary heat treatment, increasing the homogeneity of the sample and decreasing the pinning, which accelerate the process of vortex motion.

Evaluation of Variable-Temperature Cures

1928 ◽  
Vol 1 (3) ◽  
pp. 423-440
Author(s):  
J. R. Sheppard ◽  
W. B. Wiegand
Keyword(s):  
Temperature Gradient ◽  
Initial Temperature ◽  
Variable Temperature ◽  
Practical Importance ◽  
Direct Reading ◽  
Time Curve ◽  
Constant Temperature Gradient ◽  
Several Variables ◽  
Exact Evaluation ◽  
Effect Time

Abstract Employing the generally accepted empirical rule that intensity of curing action doubles with a rise of 15° F., relations are developed between the several variables of a cure segment with a constant temperature gradient—viz., “intensity of curing action,” “curing effect,” time, and temperature—and the constants of such a cure, initial temperature and temperature gradient. Exact evaluation of cures is extended to schedules involving variable temperatures by the equations showing curing effect as a function of the other properties of a cure. These are the equations of chief practical importance. Curing effect, the measure of the net value of a schedule in effecting vulcanization, may be determined for a given schedule either by calculation from one of the “effect” equations, by direct reading from one of the several herein displayed graphs of effect vs. other properties, or by estimation of the area under an intensity-time curve.

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