Elastic Properties of Solid Solutions with Intermediate Valence Sm1-xYxS

2015 ◽  
Vol 770 ◽  
pp. 137-143
Author(s):  
E.G. Soboleva ◽  
A.L. Igisheva ◽  
T.B. Krit
Keyword(s):  
Elasticity Theory ◽  
Elastic Properties ◽  
Solid Solutions ◽  
Elastic Moduli ◽  
Intermediate Valence ◽  
Elastic Parameters ◽  
Valence Transition ◽  
The Given ◽  
Poisson's Ratios ◽  
Poisson’S Ratios

The given article considers acoustic analogues of elasticity theory ratios determining Poisson’s ratios of Sm1-xYxS alloy by their elastic parameters. The article discusses behavior of sound velocities, elastic moduli, Poisson’s ratios, Grüneisen parameter and brittleness-plasticity criterion ratios depending on the concentration of alloy components including valence transition from semiconductors into the metal phase.

Acoustic and Elastic Properties of Cu3Au Alloyin in the Field of High Temperature

2015 ◽  
Vol 770 ◽  
pp. 179-184
Author(s):  
Elena P. Tesleva
Keyword(s):  
High Temperature ◽  
Sound Velocity ◽  
Elastic Properties ◽  
Temperature Interval ◽  
Elastic Waves ◽  
Elastic Moduli ◽  
Temperature Changes ◽  
Two Component ◽  
Poisson's Ratios ◽  
Poisson’S Ratios

The article studies the elastic properties of anisotropy and interatomic anharmonicity in a two-component Cu3Au alloy with positional order-disorder within the high temperature interval of 300 К and 725 К. It provides calculations on velocities of purely transverse and longitudinal elastic waves, elastic moduli (Young’s, shear, adiabatic bulk moduli) and Poisson’s ratios based on the stiffness constants сij(T) of the crystal. Sound velocity values were employed for determining the temperature changes of Grüneisen parameter along the crystallographic directions [100], [110] and [111].

Acoustic and Elastic Properties of Cu3Au Alloy between 4.2...300 К

2014 ◽  
Vol 682 ◽  
pp. 519-524 ◽  
Author(s):  
Elena P. Tesleva ◽  
Tatiana Belkova
Keyword(s):  
Sound Velocity ◽  
Elastic Properties ◽  
Temperature Interval ◽  
Elastic Waves ◽  
Elastic Moduli ◽  
Temperature Changes ◽  
Two Component ◽  
Poisson's Ratios ◽  
Poisson’S Ratios

The article studies the elastic properties of anisotropy and interatomic anharmonicity in a two-component Cu3Au alloy with positional order-disorder within the temperature interval of 4.2 К and 300 К. It provides calculations on velocities of purely transverse and longitudinal elastic waves, elastic moduli (Young’s, shear, adiabatic bulk moduli) and Poisson’s ratios based on the stiffness constants сij(T) of the crystal. Sound velocity values were employed for determining the temperature changes of Grüneisen parameter along the crystallographic directions [100], [110] and [111].

Elastic properties and phonon conductivities of Ti3Al(C0.5,N0.5)2 and Ti2Al(C0.5,N0.5) solid solutions

2008 ◽  
Vol 23 (6) ◽  
pp. 1517-1521 ◽  
Author(s):  
M. Radovic ◽  
A. Ganguly ◽  
M.W. Barsoum
Keyword(s):  
Elastic Properties ◽  
Solid Solutions ◽  
Room Temperature ◽  
Elastic Moduli ◽  
Unit Cell ◽  
Young’S Moduli ◽  
Temperature Shear ◽  
End Members ◽  
Cell Volumes ◽  
Thermal Conductivities

Herein we compare the lattice parameters, room temperature shear and Young’s moduli, and phonon thermal conductivities of Ti2AlC0.5N0.5 and Ti3Al(C0.5, N0.5)2 solid solutions with those of their end members, namely Ti2AlC, Ti2AlN, Ti3AlC2, and Ti4AlN2.9. In general, the replacement of C by N decreases the unit cell volumes and increases the elastic moduli and phonon thermal conductivities. The increase in the latter two properties, however, is sensitive to the concentrations of defects, most likely vacancies on one or more of the sublattices.

An analytical model for producing negative Poisson’s ratios and its application in explaining off-axis elastic properties of the NAT-type zeolites

2007 ◽  
Vol 55 (17) ◽  
pp. 5697-5707 ◽  
Author(s):  
Jennifer J. Williams ◽  
Christopher W. Smith ◽  
Kenneth E. Evans ◽  
Zoe A.D. Lethbridge ◽  
Richard I. Walton
Keyword(s):  
Elastic Properties ◽  
Analytical Model ◽  
Poisson's Ratios ◽  
Poisson’S Ratios

Anisotropic Dynamic and Static Mechanical Properties of Organic-rich Shale: The Influence of Stress

Geophysics ◽  
2020 ◽  
pp. 1-62
Author(s):  
Yang Wang ◽  
Luanxiao Zhao ◽  
de-hua Han ◽  
Abhijit Mitra ◽  
Hui Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Elastic Properties ◽  
Triaxial Tests ◽  
Static Properties ◽  
Static Mechanical ◽  
Intrinsic Anisotropy ◽  
The Relationship ◽  
Poisson's Ratios ◽  
Poisson’S Ratios ◽  
Static Mechanical Properties

Understanding the relationship between dynamic and static mechanical properties of organic-rich shales is crucial for successful in-situ stress profile prediction and hydraulic fracturing stimulation in unconventional reservoirs. However, the relationship between dynamic and static properties remains ambiguous, considering the complex rock microstructure and sub-surface stress environment. We report pseudo-triaxial tests on a pair of outcrop Eagle Ford shale plugs, with the axial load applied perpendicular and parallel to bedding planes, to investigate the effects of intrinsic anisotropy and anisotropic stress on dynamic-static relationships. The bedding-parallel Young's modulus is larger than the bedding-normal one dynamically and statically, whereas there exist complex relations among three static Poisson's ratios, which are attributed to the intrinsic anisotropy induced by the lenticular texture and finely laminated alignment of kerogen. Along with a stress increment, static tests respond to superpositions of the elastic, viscoelastic, and non-elastic properties, whereas dynamic tests, with more than two orders of magnitude smaller strain amplitude, only reflect the elastic properties of rocks. As a result, the static properties characteristically exhibit more stress dependence than the dynamic properties. Moreover, the evolutions of static properties, especially two static Poisson's ratios in the horizontal plug, are significantly influenced by the applied stress orientation with respect to the bedding plane. Lastly, we calculate four independent stiffnesses using the five static mechanical parameters with the assumption of transverse isotropy to compare with those calculated from ultrasonic velocities at different stress levels. Finally, when the deviatoric stress is approximately 20 MPa, static parameters derived from stress loading, unloading, and reloading almost intersect together. At this stress level, dynamic and static stiffnesses demonstrate a reasonable correlation with the fitting coefficient of approximately 1.4.

Prediction of 3D elastic moduli and Poisson’s ratios of pillared graphene nanostructures

Carbon ◽  
2012 ◽  
Vol 50 (2) ◽  
pp. 603-611 ◽  
Author(s):  
Sangwook Sihn ◽  
Vikas Varshney ◽  
Ajit K. Roy ◽  
Barry L. Farmer
Keyword(s):  
Elastic Moduli ◽  
Poisson's Ratios ◽  
Poisson’S Ratios ◽  
Graphene Nanostructures

scholarly journals Measurement of standard and off-axis elastic moduli and Poisson’s ratios of spruce and yew wood in the transverse plane

2010 ◽  
Vol 44 (3) ◽  
pp. 451-464 ◽  
Author(s):  
Jozsef Garab ◽  
Daniel Keunecke ◽  
Stefan Hering ◽  
Jozsef Szalai ◽  
Peter Niemz
Keyword(s):  
Elastic Moduli ◽  
Transverse Plane ◽  
Poisson's Ratios ◽  
Poisson’S Ratios

Behavior of Poisson's Ratio in the Crystal Cu2O

2014 ◽  
Vol 682 ◽  
pp. 170-173 ◽  
Author(s):  
V.N. Belomestnykh ◽  
E.G. Soboleva
Keyword(s):  
Temperature Interval ◽  
Poisson’S Ratio ◽  
Poisson's Ratio ◽  
External Conditions ◽  
Experimental Values ◽  
The Given ◽  
Poisson's Ratios ◽  
Poisson’S Ratios

Anisotropic and isotropic Poisson’s ratios for cuprum oxide are studied basing on the known experimental values of rigidity constants of Cu2O monocrystals within the temperature interval 4.2...873 K. The Poisson’s ratios of the given crystal are studied under the change of external conditions within the given intervals.

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