Results 241 to 250 of about 7,206,975 (296)

Resonant Column Tests and Nonlinear Elasticity in Simulated Rocks

Rock Mechanics and Rock Engineering, 2017
Rocks are generally regarded as linearly elastic even though the manifestations of nonlinearity are prominent. The variations of elastic constants with varying strain levels and stress conditions, disagreement between static and dynamic moduli, etc., are some of the examples of nonlinear elasticity in rocks.
Resmi Sebastian, T G Sitharam
exaly   +2 more sources

Applications of the New Approach to Resonant Column Testing [PDF]

Geotechnical Testing Journal, 2015
Abstract For more than 50 years, the resonant column test has been used to measure the shear modulus and damping of soils for shear strains ranging from 10−5 % to 0.5 %. For most soils, the test is non-destructive, and tests may be performed on the same specimen at multiple confining stresses simulating in situ conditions from near ...
Drnevich, Vincent P., Werden, Salim, Ashlock, Jeramy, Hall Jr., John R.   +3 more
openaire   +3 more sources

Sample Coupling in Resonant Column Testing of Cemented Soils

1990
Low-strain shear moduli of lightly cemented sand can be obtained by testing specimens in a resonant column. In the literature a variety of techniques have been suggested for coupling the sample to the base and cap of the device. These studies' results suggest that the shear modulus of cemented sand changes with confining pressure.
PL Lovelady, M Picornell
exaly   +2 more sources

Pore Pressure Buildup in Resonant Column Tests

Journal of Geotechnical Engineering, 1984
Resonant column tests were performed on fully saturated and dry hollow cylindrical and fully saturated solid cylindrical specimens of Monterey No. 0 sand of 60% relative density subjected to 96 kPa confining pressure. The hollow specimens were tested by torsional excitation and the solid specimens by longitudinal excitation.
Riley M. Chung, Felix Y. Yokel, Herbert Wechsler   +2 more
openaire   +2 more sources

Resonant Column Testing of Agricultural Soils

Transactions of the ASAE, 1988
ABSTRACT REMOLDED cylindrical specimens and minimally-disturbed cylindrical samples of three types of agricultural soils were tested in a torsional-type resonant column device. The soils were tested at confining stresses close to zero to simulate field conditions.
null A. R. Womac, null F. D. Tompkins, null E. C. Drumm   +2 more
openaire   +1 more source

New Approach to Resonant Column Testing

Geotechnical Testing Journal, 2013
Abstract This paper describes a new type of torsional resonant column device that has a quasi-fixed base and free top. In this device, a relatively rigid torque transducer is placed between the bottom platen and the fixed chamber base. A large capacity torque motor excites the top platen.
Salim K. Werden, Vincent P. Drnevich, John R. Hall, Chafik Hankour, Carolyn T. Conlee, W. Allen Marr   +5 more
openaire   +1 more source

Evaluation of Resonant Column Test Devices

Journal of the Geotechnical Engineering Division, 1976
Resonant column tests were performed by six participants in a program designed to evaluate results from various devices. The participants were Drnevich, Hardin, Woods, Shannon & Wilson, Inc., the U.S. Army Engineer Cold Regions Research and Engineering Laboratory, and the U.S. Army Engineer Waterways Experiment Station.
George R. Skoglund, Robert W. Cunny, William F. Marcuson   +2 more
openaire   +1 more source

Resonant Column Testing of Frozen Ottawa Sand

Geotechnical Testing Journal, 1987
Abstract The unique properties of frozen soils have posed special problems for engineers seeking to install stable structures in cold climates. Foundations, pipelines, and other structures subjected to high-frequency low-amplitude vibrations present special problems to the designer even when construction occurs in nonfrozen ground.
PJ Bosscher, DL Nelson
openaire   +1 more source

Resonant Column Tests on Partially Saturated Sands

Geotechnical Testing Journal, 1991
Abstract This paper describes the measurement of the influence of capillary effects on the dynamic shear modulus of partially saturated sands. A Hall-type resonant column apparatus was used to perform the experiments. The materials tested included natural angular and subrounded sands, angular and subrounded sands with specified ...
X Qian, DH Gray, RD Woods
openaire   +1 more source

Evaluation of Linearity of First Mode of Vibration in Resonant Column Testing

Symposium on the Application of Geophysics to Engineering and Environmental Problems 2005, 2005
The shear strain along the height of a specimen in resonant column testing (ASTM D4015-92) is assumed to vary linearly when evaluating its dynamic shear modulus and damping ratio. To examine this assumption, specimens of dry sand, mine tailings, and cemented sand are tested at different confinement and shear strain levels.
Zahid H. Khan, Giovanni Cascante, Hesham El Naggar   +2 more
openaire   +1 more source