Device for Determination of the Change in Calibration of a Torsion Load Cell when under Hydrostatic Pressure

1970 ◽  
Vol 41 (6) ◽  
pp. 812-814 ◽  
Author(s):  
A. E. Abey ◽  
L. M. Wagner
Keyword(s):  
Hydrostatic Pressure ◽  
Load Cell

Activation Volume Measurements

1971 ◽  
Vol 26 (2) ◽  
pp. 291-299 ◽  
Author(s):  
Michele Beyeler ◽  
David Lazarus
Keyword(s):  
Sodium Chloride ◽  
Hydrostatic Pressure ◽  
Ionic Conductivity ◽  
Activation Volume ◽  
Tracer Diffusion ◽  
Accurate Temperature ◽  
Volume Measurements ◽  
Accurate Temperature Control ◽  
Effect Of Hydrostatic Pressure

Abstract The determination of the activation volume of diffusion is one of the best methods for the in­vestigation of the relaxation of atoms or ions around defects. This paper discusses two experimental techniques for the determination of the activation volume for diffusion, by studying the effect of hydrostatic pressure on tracer diffusion and on ionic conductivity. Such experiments require a very clean hydrostatic pressure environment, accurate temperature control and measurement, and well defined specimen geometry. The difficulties encountered during such experiments are discussed. Results are given for the activation volumes of diffusion in beryllium and in sodium chloride.

The effect of hydrostatic pressure on the Fermi surface of white tin

1979 ◽  
Vol 57 (6) ◽  
pp. 884-889 ◽  
Author(s):  
J. M. Perz ◽  
I. M. Templeton
Keyword(s):  
Hydrostatic Pressure ◽  
Fermi Surface ◽  
Cross Sectional ◽  
Indirect Methods ◽  
Comprehensive Determination ◽  
Shift Technique ◽  
Direct And Indirect Methods ◽  
The Magnetic Field

The derivatives with respect to hydrostatic pressure of 12 extremal cross-sectional areas of the Fermi surface of tetragonal white (β) tin have been measured by the fluid helium de Haas van Alphen phase shift technique. The samples were carefully aligned in situ to have a crystal symmetry axis ([001], [100], or [110]) parallel to the magnetic field. The measured derivatives differ significantly from most values found previously by both direct and indirect methods; it is believed that the present work provides the first reliable comprehensive determination of these quantities. The present experiments also confirm the conclusions of magnetostriction experiments that there is a second orbit normal to [100] on the sixth zone surface not identified in earlier conventional de Haas van Alphen work, and that the third zone extremal areas normal to [001] are larger than previously accepted values determined in de Haas van Alphen studies.

scholarly journals Determination of elastic parameters of grain with oedometric and acoustic methods

2012 ◽  
Vol 49 (No. 2) ◽  
pp. 56-60 ◽  
Author(s):  
M. Stasiak
Keyword(s):  
Hydrostatic Pressure ◽  
Moisture Content ◽  
Shear Wave ◽  
Equilibrium Moisture Content ◽  
Shear Wave Velocity ◽  
Modulus Of Elasticity ◽  
Uniaxial Compression Test ◽  
Elastic Parameters ◽  
Acoustic Methods

Values of modulus of elasticity E and Poisson’s ratio   were determined with two methods adopted from geotechnique. First approach used was a method proposed by Sawicki (1994). This type of examination was applied to estimate values of E and v for wheat and rapeseed beddings for five levels of moisture content ranging from 6% to 20%. Modulus of elasticity E of wheat was found to decrease with an increase in moisture content. With the second method values of E were determined based on measurement of shear wave velocity. Tests were performed for bedding of wheat and rapeseed under equilibrium moisture content. Values of modulus of elasticity were found to depend of hydrostatic pressure and were higher then those determined in uniaxial compression test.

Determination of Silkworm Silk Fibroin Compressibility Using High Hydrostatic Pressure with in Situ X-ray Microdiffraction

2014 ◽  
Vol 47 (20) ◽  
pp. 7187-7193 ◽  
Author(s):  
Christina Krywka ◽  
Igor Krasnov ◽  
Roxana Figuli ◽  
Manfred Burghammer ◽  
Martin Müller
Keyword(s):  
Hydrostatic Pressure ◽  
Silk Fibroin ◽  
High Hydrostatic Pressure ◽  
X Ray ◽  
Silkworm Silk

scholarly journals VIII. On the mechanical stretching of liquids: an experimental determination of the volume-extensibility of ethyl-alcohol

1892 ◽  
Vol 183 ◽  
pp. 355-370 ◽  
Keyword(s):  
Hydrostatic Pressure ◽  
Cross Section ◽  
Vapour Pressure ◽  
Cavendish Laboratory ◽  
Thin Glass ◽  
Mercury Column ◽  
State Of Tension ◽  
Mechanical Stretching ◽  
Inverted Barometer

Three methods are known by which a liquid may be subjected to a bodily tension. (1) The method of the inverted barometer , familiar to most physicists, by which, with care, a mercury column of many times the barometric height may be supported by its adhesion to the top of the tube. In such a column the hydrostatic pressure is negative above the barometric height, or the liquid above this level is in a state of tension. This tension increases with the height and is propagated in all directions to the walls of the tube. When the upper part of the tube is made elliptical in cross-section and of thin glass, its yielding to the inward pull may be easily observed. (2) The centrifugal method , devised by Professor Osborne Reynolds, in which a U-tube, ABCD, of glass, closed at both ends, contains air-free liquid, ABC, and vapour, CD. This tube is fixed to a suitable board and whirled about an axis, O, a little beyond the end, A, and perpendicular to the plane of the board. If CE (see figure) be the arc of a circle described about O, then while rotation continues the liquid between E and A is in a state of tension, increasing from zero (if we ignore the vapour-pressure) at E to a maximum at A. By this method Professor Osborne Reynolds has subjected water to a tension of about 5 atmospheres or 72·5 pounds per square inch, while the author, experimenting in the Cavendish Laboratory in 1886, succeeded in reaching, with alcohol, a tension of 7·9 atmospheres or 116 pounds per square inch, and, with strong sulphuric acid, 11·8 atmospheres or 173 pounds per square inch.

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