Determination of the behavior of a standard linear body in a plastomere of plane-parallel shear

1979 ◽  
Vol 19 (5) ◽  
pp. 691-695 ◽  
Author(s):  
P. M. Gorbunov
Keyword(s):  
Plane Parallel ◽  
Standard Linear ◽  
Linear Body

scholarly journals Investigation of the frequency properties of a standard linear body

2021 ◽  
Vol 17 (2) ◽  
pp. 166-173
Author(s):  
Vladimir P. Tregubov ◽  
◽  
Nadezhda K. Egorova ◽  
Keyword(s):  
Stress Relaxation ◽  
Frequency Response ◽  
Damping Coefficient ◽  
Maximum Frequency ◽  
Subsequent Increase ◽  
Standard Linear ◽  
Voigt Model ◽  
Frequency Properties ◽  
Linear Body

It is known that the Кelvin-Voigt model does not describe stress relaxation, which is observed along with elastic properties in many polymers and biomaterials. In this regard, the standard linear body model is used to describe the properties of these materials. Studies of its properties were mainly limited to the study of its reaction to an instantaneously applied load, as well as to the determination of the time and nature of stress relaxation. Аt the same time, the frequency properties of the standard linear body remained unexplored. In this regard, an analysis of its frequency properties was carried out, which made it possible to study its behavior under vibration exposure. Оn the basis of the equation of motion, the amplitude-frequency response (АFC) was constructed, and its peculiarity was revealed, which consists in the fact that an increase in the damping coefficient leads to a decrease in the maximum value of the АFC only to a certain value greater than one. А further increase in the damping coefficient leads to an increase in the maximum frequency response up to infinity at a frequency that should also be considered resonant. Thus, the frequency response of a standard linear body always has a maximum. The subsequent increase in the damping coefficient leads to the tendency of the maximum frequency response to zero at infinity.

Ferriferous orthoclase from Madagascar

1954 ◽  
Vol 30 (226) ◽  
pp. 409-427 ◽  
Author(s):  
D. S. Coombs
Keyword(s):  
Precise Determination ◽  
Axial Plane ◽  
Axial Angle ◽  
Plane Parallel ◽  
Transitional Forms ◽  
Apparent Conflict

In 1916 Kôzu recorded the fact that a specimen of yellow Madagascar orthoclase, subsequently shown by Seto (1923) to contain 2-93% Fe203, had an optic axial angle of 20° 17' (NaD light) with the optic axial plane parallel to (010). This observation is in apparent conflict with the useful curves relating 2V to composition for alkali-felspars compiled by Dr. O. F. Turtle (1951, 1952). These curves were designed to show how the felspars fall into several more or less distinct series, rather than as an aid to the precise determination of composition, which in fact must be decided by other means. The possibility of transitional forms between the series was clearly recognized (e.g. 1952, p. 565).

scholarly journals The current distribution in an electrochemical cell. Part V: The determination of the depth of the current line penetration between the edges of the electrodes and the side walls of the cell

1999 ◽  
Vol 64 (12) ◽  
pp. 795-800 ◽  
Author(s):  
Konstantin Popov ◽  
Slavisa Pesic ◽  
Tanja Kostic
Keyword(s):  
Current Distribution ◽  
Electrochemical Cell ◽  
Polarization Curves ◽  
Current Line ◽  
Plane Parallel ◽  
Electrode Arrangement ◽  
A Cell ◽  
Side Walls ◽  
Parallel Electrode

A method for the calculation of the depth of the current line penetration between the edges of the electrodes and the side walls of the cell in a cell with plane parallel electrode arrangement is proposed. The method is verified by the calculation of the polarization curves for the cells in which the electrode edges do not touch the side walls of the cell. The agreement between the calculated and the measured values was fair.

scholarly journals I mpact of compaction and thaw conditionson deformation characteristics of thawing soils

2017 ◽  
pp. 58-63
Author(s):  
P. I. Kotov ◽  
L. T. Roman ◽  
M. N. Tsarapov
Keyword(s):  
Physical Properties ◽  
Experimental Determination ◽  
Sandy Loam ◽  
Three Dimensional ◽  
Deformation Characteristics ◽  
Clay Loam ◽  
Laboratory Studies ◽  
Compression Coefficient ◽  
Plane Parallel

The results of laboratory studies of the effect of thawing conditions (plane-parallel or three dimensional) on the deformation characteristics (thawing and compression coefficients) thaw- ing soils (sand, sandy loam, clay loam) with desired physical properties of massive and layered cryogenic textures presented in the article. It was found that the values of the thawing coefficient bigger after three dimensional thawing, and compression coefficient after plane- parallel thaw- ing. The obtained data allowed to establish the applicability of the experimental determination of thawing soils deformation characteristics regardless of thawing conditions.

Determination of the optical sign of a crystal by a conoscopic method

2010 ◽  
Vol 43 (5) ◽  
pp. 955-958 ◽  
Author(s):  
Olga Pikoul
Keyword(s):  
Optical System ◽  
Small Angle ◽  
Vertical Axis ◽  
Crystal Plate ◽  
Plane Parallel ◽  
Polarizing Microscope ◽  
Arbitrary Thickness ◽  
Optical Sign

To determine the optical sign of an investigated crystal plate, a conoscopic pattern of the latter is changed in an optical system without a polarizing microscope. To change the conoscopic pattern, an auxiliary plane-parallel crystal plate of arbitrary thickness and known optical sign is used. Such a plate, which is either capable of rotation about its vertical axis or fixed at a small angle to the investigated plate, is introduced into the optical system.  Upon rotation of the auxiliary crystal plate, isochromatic rings on the conoscopic pattern are offset. Based on the direction of the offset from the centre of the pattern, a conclusion is drawn about the optical sign of the investigated crystal plate. When the auxiliary crystal plate is fixed at a small angle to the investigated plate, either two or three conoscopic patterns are observed on the screen. The optical sign of the investigated crystal plate is determined by the number of conoscopic patterns on the screen. If there are three patterns, then the optical signs of the auxiliary and the investigated plates are the same. If there are two patterns, then the optical signs of the auxiliary and the investigated plates are opposite.

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