An acustic determination of the direction of the vibration of ordinary acoustic shear wave transducers

1982 ◽  
Vol 3 (2) ◽  
pp. 77-84 ◽  
Author(s):  
J. Zuidema ◽  
Th. M. van Soest
Keyword(s):  
Shear Wave

scholarly journals Determination of Normal Hepatic Elasticity by Using Real-time Shear-wave Elastography

Radiology ◽  
2014 ◽  
Vol 271 (3) ◽  
pp. 895-900 ◽  
Author(s):  
Chong Hyun Suh ◽  
So Yeon Kim ◽  
Kyoung Won Kim ◽  
Young-Suk Lim ◽  
So Jung Lee ◽  
...  
Keyword(s):  
Real Time ◽  
Shear Wave ◽  
Shear Wave Elastography

scholarly journals Determination of compressional and shear wave speed profiles and attenuation in sea ice

1990 ◽  
Vol 87 (S1) ◽  
pp. S84-S84 ◽  
Author(s):  
Suhramaniam D. Rajah ◽  
James A. Doutt ◽  
George V. Frisk
Keyword(s):  
Sea Ice ◽  
Shear Wave ◽  
Wave Speed ◽  
Shear Wave Speed

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.

Measuring shear and compression wave velocities of soil using bender–extender elements

2009 ◽  
Vol 46 (7) ◽  
pp. 792-812 ◽  
Author(s):  
E. C. Leong ◽  
J. Cahyadi ◽  
H. Rahardjo
Keyword(s):  
Shear Wave ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Compression Wave ◽  
Small Strain ◽  
Reliable Determination ◽  
Digital Oscilloscope ◽  
Compression Waves ◽  
Wave Velocities

Piezoceramic elements have been used for laboratory measurement of wave velocity in soil and rock specimens. Shear-wave piezoceramic elements (bender elements) are commonly used to measure shear wave velocity for the determination of small-strain shear modulus. Compression-wave piezoceramic elements (extender elements), on the other hand, are less commonly used as compression wave velocity is less frequently measured. In this paper, the performance of a pair of bender–extender elements for the determination of both shear and compression wave velocities is examined with respect to the resolution of the recorder, bender–extender element size. and excitation voltage frequency. The evaluation showed that the performance of the bender–extender elements test can be improved by considering the following conditions: (i) the digital oscilloscope used to record the bender–extender element signals should have a high analog to digital (A/D) conversion resolution; (ii) the size of the bender–extender elements plays an important role in the strength and quality of the receiver signal, especially for compression waves; and (iii) using a wave path length to wavelength ratio of 3.33 enables a more reliable determination of shear wave velocity.

DETERMINATION OF THE ELASTIC CONSTANTS OF AN ISOTROPIC SOLID USING A “PLATE” VELOCITY MEASUREMENT

Geophysics ◽  
1966 ◽  
Vol 31 (5) ◽  
pp. 984-986 ◽  
Author(s):  
Ernest A. Kaarsberg
Keyword(s):  
Shear Wave ◽  
Elastic Constants ◽  
High Frequency ◽  
Velocity Measurement ◽  
Infinite Plate ◽  
Wave Velocities ◽  
Shear Wave Velocities ◽  
Plate Velocity ◽  
Isotropic Solid

From the longitudinal and shear wave velocities measured in a solid, all of its elastic constants can be determined. Jamieson and Hoskins (1963) have shown how shear wave velocities can be measured in solids with an arrangement which converts high frequency longitudinal wave pulses from axially polarized ceramic transducers into shear wave pulses. This note illustrates how such elastic constants can also be determined with the aid of longitudinal “infinite plate” velocities.

Sign in / Sign up

Export Citation Format

Share Document