Effect of shear strength on Hugoniot-compression curve and the equation of state of tungsten (W)

2016 ◽  
Vol 119 (3) ◽  
pp. 035904 ◽  
Author(s):  
Tsutomu Mashimo ◽  
Xun Liu ◽  
Masao Kodama ◽  
Eugene Zaretsky ◽  
Masahide Katayama ◽  
...  
Keyword(s):  
Shear Strength ◽  
Equation Of State ◽  
Compression Curve

Equation of State and Shear Strength at Multimegabar Pressures: Magnesium Oxide to 227 GPa

1995 ◽  
Vol 74 (8) ◽  
pp. 1371-1374 ◽  
Author(s):  
Thomas S. Duffy ◽  
Russell J. Hemley ◽  
Ho-kwang Mao
Keyword(s):  
Shear Strength ◽  
Equation Of State ◽  
Magnesium Oxide

SIZE-DEPENDENT EQUATION OF STATE FOR NANOMATERIALS

2012 ◽  
Vol 11 (01) ◽  
pp. 1250010
Author(s):  
ARCHANA BHATT ◽  
MUNISH KUMAR
Keyword(s):  
Particle Size ◽  
Equation Of State ◽  
Size Dependence ◽  
Theoretical Method ◽  
Particle Sizes ◽  
Isothermal Compression ◽  
Compression Curve ◽  
Size Dependent ◽  
Theory And Experiment ◽  
Good Agreement

Simple theoretical method is developed to study the size dependence of equation of state of nanomaterials. The isothermal compression of Ni and ε- Fe has been computed for different particle sizes. A shift in compression curve is obtained by increasing the particle size. This demonstrates the softening of the material by increasing the particle size. For larger particle size (~100 nm) the compression curve resembles with that of the bulk. This demonstrates that the nanomaterial becomes bulk for larger particle size. The results have been compared with the available experimental data. A good agreement between theory and experiment demonstrates the validity of the method proposed in the present paper.

scholarly journals Elasticity, shear strength, and equation of state of molybdenum and gold from x-ray diffraction under nonhydrostatic compression to 24 GPa

1999 ◽  
Vol 86 (12) ◽  
pp. 6729-6736 ◽  
Author(s):  
Thomas S. Duffy ◽  
Guoyin Shen ◽  
Jinfu Shu ◽  
Ho-Kwang Mao ◽  
Russell J. Hemley ◽  
...  
Keyword(s):  
Shear Strength ◽  
Equation Of State ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nonhydrostatic Compression

Equation of state, elasticity, and shear strength of pyrite under high pressure

2002 ◽  
Vol 29 (1) ◽  
pp. 1-9 ◽  
Author(s):  
S. Merkel ◽  
A. P. Jephcoat ◽  
J. Shu ◽  
H.-K. Mao ◽  
P. Gillet ◽  
...  
Keyword(s):  
High Pressure ◽  
Shear Strength ◽  
Equation Of State

Constitutive equations for reliable projectile penetration analysis into a concrete medium

2019 ◽  
Vol 11 (2) ◽  
pp. 159-184
Author(s):  
Vladimir R Feldgun ◽  
David Z Yankelevsky
Keyword(s):  
Compressive Strength ◽  
Shear Strength ◽  
Equation Of State ◽  
Penetration Depth ◽  
Uniaxial Compressive Strength ◽  
Constitutive Equations ◽  
Concrete Strength ◽  
Time History ◽  
Non Linear ◽  
Concrete Target

This article analyzes the fundamental question of the mechanical properties representation in penetration analysis and its effect on the calculated results. Penetration analysis into a concrete target with a specified uniaxial compressive strength was carried out using different material models appearing in software libraries. These models determine the specific material equation of state and shear strength envelope related to the concrete uniaxial compressive strength. Different results were obtained for the same concrete strength. This proves that the unconfined compressive strength is not the governing parameter which determines the projectile penetration characteristics and that a large variation of results is obtained from different models. Analysis was then carried out on a case with documented constitutive properties of a concrete target that was penetrated by an instrumented projectile. The predicted penetration depth and the projectile deceleration time history were compared with the measured data, and very good correspondence was obtained. This proved that the specific properties of the penetrated medium should be incorporated in the analysis to properly predict the penetration event. The study then examined the commonly used approximation of a linearized equation of state and a linear Mohr–Coulomb model, replacing the true non-linear equations of state and the true non-linear shear strength dependence, and the linearized relationships’ effect on the analyzed results was assessed. A detailed study of the solution sensitivity to different parameters of the Mohr–Coulomb relationship then followed, and its effect on different penetration parameters (nose embedment duration, nose embedment velocity, penetration depth, peak deceleration, quasi-static deceleration) has been examined, to demonstrate how a perturbation in assumed concrete properties affects the solution of the penetration problem. The article illuminates the role of the constitutive equations on penetration analysis and the importance of the proper selection of the representative expressions and of their approximations.

Equation of state for hard convex body fluid mixtures

1998 ◽  
Vol 94 (5) ◽  
pp. 809-814 ◽  
Author(s):  
C. BARRIO ◽  
J.R. SOLANA
Keyword(s):  
Equation Of State ◽  
Convex Body ◽  
Body Fluid ◽  
Fluid Mixtures

Equation of state of shock compressed liquid deuterium

2000 ◽  
Vol 10 (PR5) ◽  
pp. Pr5-281-Pr5-286
Author(s):  
M. Ross ◽  
L. H. Yang ◽  
G. Galli
Keyword(s):  
Equation Of State ◽  
Compressed Liquid

ON THE EQUATION OF STATE OF THE WIGNER MODEL

1980 ◽  
Vol 41 (C2) ◽  
pp. C2-83-C2-83
Author(s):  
Ph. Choquard
Keyword(s):  
Equation Of State
Sign in / Sign up

Export Citation Format

Share Document