NDLI: Dependence of the Longitudinal Velocity of Sound in Constructional Ceramic Materials on Pressure and Damage Rate

Content Provider	Springer Nature Link
Author	Skripnyak, V. A. Skripnyak, E. G. Zhukova, T. V.
Copyright Year	2001
Abstract	The effect of porosity and concentration of planar microcracks on the velocity of elastic waves in polycrystalline ceramic materials on the basis of SiC, Al2$O3, B4C, and ZrO2 is numerically studied. The mechanical behavior of ceramics is described using the model of a damaged medium. Various dependences that describe the relationship between the effective moduli of elasticity of the medium material and the relative volume of damages are analyzed as applied to predicting wave dynamics. For porosities up to 20%, a satisfactory prediction of the velocity of longitudinal waves in ceramics is ensured by the use of exponential and linear dependences. Within this range of porosities, the velocity of elastic waves decreases linearly with increasing relative volume of damages. The influence of the pulse amplitude on the velocity of elastic waves is analyzed. It is shown that the velocity of elastic waves in constructional ceramics increases in proportion to pressure up to 5% within the range of pulse amplitudes that do not exceed the Hugoniot limit of elasticity. Numerical values of coefficients in the relation between the velocity of the longitudinal elastic wave and the velocity of material particles are determined for ceramic materials considered. As the Hugoniot limit of elasticity is exceeded, the values of the coefficients decrease by 10–30% for different ceramic materials. The resultant values of the coefficients are in good agreement with experimental data found in the literature.
Starting Page	600
Ending Page	606
Page Count	7
File Format	PDF
ISSN	00105082
Journal	Combustion, Explosion and Shock Waves
Volume Number	37
Issue Number	5
e-ISSN	15738345
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2001-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mechanics, Fluids, Thermodynamics Mechanics Engineering Vibration, Dynamical Systems, Control Mechanical Engineering
Content Type	Text
Resource Type	Article
Subject	Chemistry Physics and Astronomy Fuel Technology Chemical Engineering Energy Engineering and Power Technology

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