DETERMINATION OF PARAMETERS OF HIGH TEMPERATURE INTERNAL FRICTION FROM SINGLE EXPERIMENTAL CURVE

1987 ◽  
Vol 48 (C8) ◽  
pp. C8-323-C8-327
Author(s):  
Z. JIANG ◽  
X. ZHU ◽  
W. FAN
Keyword(s):  
High Temperature ◽  
Internal Friction ◽  
Experimental Curve ◽  
Determination Of Parameters

DETERMINATION OF PARAMETERS OF STEINBERG-GUINAN CONSTITUTIVE MODEL WITH SHOCK WAVE EXPERIMENTS

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1111-1116 ◽  
Author(s):  
JIANXIANG PENG ◽  
CHANGMING HU ◽  
YINGLEI LI ◽  
LIN ZHANG ◽  
FUQIAN JING
Keyword(s):  
Shock Wave ◽  
High Pressure ◽  
High Temperature ◽  
Yield Strength ◽  
Shear Modulus ◽  
Constitutive Model ◽  
Wave Profile ◽  
Determination Of Parameters ◽  
Derivatives Of

Steinberg-Guinan constitutive model is widely used in impact engineering simulations. Shock wave profile measurements of Al , Cu , and W under shock pressures ranging from 4 GPa to 200 GPa were analyzed, and shear modulus G and yield strength Y of these materials were obtained by using the high-pressure sonic velocities and rate independent Lagrange analysis results. Then values of derivatives of G and Y with respect to pressure or temperature at the reference state of these three metals were determined. By analyzing the pressure and temperature dependence of shear modulus and yield strength, we conclude that the relations of Steinberg-Guinan constitutive model, Y/G=constant, are approximately correct on Hugoniot state for these materials. So this is a probable approach to solve the difficulty of measurement of Y under high-pressure and high-temperature directly.

Determination of parameters of short circuit of power transformer by means of mathematical modeling

2017 ◽  
Vol 26 (102) ◽  
pp. 110-119
Author(s):  
D. S. Yarymbash, ◽  
◽  
S. T. Yarymbash, ◽  
T. E. Divchuk, ◽  
D. A. Litvinov
Keyword(s):  
Mathematical Modeling ◽  
Power Transformer ◽  
Short Circuit ◽  
Determination Of Parameters
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