Torsional shear wave transducer

1995 ◽  
Vol 98 (3) ◽  
pp. 1258-1259
Author(s):  
A. K. Walden ◽  
T. R. Howarth
Keyword(s):  
Shear Wave ◽  
Torsional Shear ◽  
Wave Transducer

An improved shear wave transducer

1978 ◽  
Vol 63 (5) ◽  
pp. 1643-1645 ◽  
Author(s):  
Donald J. Shirley
Keyword(s):  
Shear Wave ◽  
Wave Transducer

Conversion Characteristics of the Shear Wave Transducer Made of Unidirectionally Aligned ZnO Film in Plane

2006 ◽  
Vol 45 (5A) ◽  
pp. 4201-4203 ◽  
Author(s):  
Takuya Nohara ◽  
Takahiko Yanagitani ◽  
Mami Matsukawa ◽  
Yoshiaki Watanabe
Keyword(s):  
Shear Wave ◽  
Zno Film ◽  
Wave Transducer

Measurement of small-strain shear modulus Gmax of dry and saturated sands by bender element, resonant column, and torsional shear tests

2008 ◽  
Vol 45 (10) ◽  
pp. 1426-1438 ◽  
Author(s):  
Jun-Ung Youn ◽  
Yun-Wook Choo ◽  
Dong-Soo Kim
Keyword(s):  
Shear Modulus ◽  
Shear Wave ◽  
Shear Wave Velocity ◽  
Small Strain ◽  
Resonant Column ◽  
Test Results ◽  
Bender Element ◽  
Small Strain Shear Modulus ◽  
Torsional Shear ◽  
Saturated Sands

The bender element method is an experimental technique used to determine the small-strain shear modulus (Gmax) of a soil by measuring the velocity of shear wave propagation through a sample. Bender elements have been applied as versatile transducers to measure the Gmax of wet and dry soils in various laboratory apparatuses. However, certain aspects of the bender element method have yet to be clearly specified because of uncertainties in determining travel time. In this paper, the bender element (BE), resonant column (RC), and torsional shear (TS) tests were performed on the same specimens using the modified Stokoe-type RC and TS testing equipment. Two clean sands, Toyoura and silica sands, were tested at various densities and mean effective stresses under dry and saturated conditions. Based on the test results, methods of determining travel time in BE tests were evaluated by comparing the results of RC, TS, and BE tests. Also, methods to evaluate Gmax of saturated sands from the shear-wave velocity (Vs) obtained by RC and BE tests were investigated by comparing the three sets of test results. Biot’s theory on frequency dependence of shear-wave velocity was adopted to consider dispersion of a shear wave in saturated conditions. The results of this study suggest that the total mass density, which is commonly used to convert Gmax from the measured Vs in saturated soils, should not be used to convert Vs to Gmax when the frequency of excitation is 10% greater than the characteristic frequency (fc) of the soil.

Ultrasound viscoelasticity assessment using an adaptive torsional shear wave propagation method

2016 ◽  
Vol 43 (4) ◽  
pp. 1603-1614 ◽  
Author(s):  
Abderrahmane Ouared ◽  
Siavash Kazemirad ◽  
Emmanuel Montagnon ◽  
Guy Cloutier
Keyword(s):  
Wave Propagation ◽  
Shear Wave ◽  
Torsional Shear ◽  
Wave Propagation Method
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