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Direct shear tests on reinforced sand
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1987New data are presented from internal measurements in direct shear tests on sand. An interpretation is given for the plane strain angle of friction and the angle of dilation of sand in a direct shear test. The direct shear angle of friction deduced from the conventional analysis is shown to under-estimate the frictional shearing resistance of sand by ...
R. A. Jewell, C. P. Wroth
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2014 Joint Rail Conference, 2014
This paper summarizes the appropriate equipment and test procedure for ballast shear strength testing using the direct shear method (ASTM D3080 and D5321) and presents some typical results. To accomplish this ballast testing, a full-scale direct shear box was developed that can accommodate an approximately 1 m (3 feet) wide and 0.6 m (2 feet) deep ...
Timothy D. Stark +2 more
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This paper summarizes the appropriate equipment and test procedure for ballast shear strength testing using the direct shear method (ASTM D3080 and D5321) and presents some typical results. To accomplish this ballast testing, a full-scale direct shear box was developed that can accommodate an approximately 1 m (3 feet) wide and 0.6 m (2 feet) deep ...
Timothy D. Stark +2 more
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Continuous failure state direct shear tests
Rock Mechanics and Rock Engineering, 1984The paper deals with a new testing procedure aimed at determining the failure envelopes for peak and residual strength in direct shear tests. In a “continuous failure state” direct shear test the specimen is maintained in a state of permanent sliding while the shear and normal stress are being steadily changed.
A. Tisa, K. Kov�ri
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Simple shear tests with a varying shearing direction during cyclic shearing
Géotechnique Letters, 2014Tests with cyclic lateral loading on a pile have shown that the pile reacts to a change of loading direction with increasing accumulation of lateral displacements. This phenomenon is known as ‘pile drift’. To investigate this behaviour at small scale under laboratory conditions, a specifically designed simple shear apparatus with two shearing axes was
C. Rudolph, J. Grabe, I. Albrecht
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International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1989
Experimental data from unreinforced direct shear tests on sand are presented to show the influence of the boundary conditions on the test measurements. The data and the theoretical considerations of the loading in the test show that a symmetrical direct shear test arrangement is preferable.
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Experimental data from unreinforced direct shear tests on sand are presented to show the influence of the boundary conditions on the test measurements. The data and the theoretical considerations of the loading in the test show that a symmetrical direct shear test arrangement is preferable.
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Scaling Effects in Direct Shear Tests
AIP Conference Proceedings, 2009Laboratory experiments of the direct shear test were performed on spherical particles of different materials and diameters. Results of the bulk friction vs. non‐dimensional shear displacement are presented as a function of the non‐dimensional particle diameter. Simulations of the direct shear test were performed using the Discrete Element Method (DEM).
Andrés D. Orlando +4 more
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Scale dependence of direct shear tests
Science Bulletin, 2009Direct shear test has been widely used to measure the shear strength of soils and other particulate materials in industry because of its simplicity. However, the results can be dependent on the specimen size. The ASTM (American Society for Testing and Materials) publications suggest that for testing soils the shear box should be at least ten times the ...
Qiang Zhou +3 more
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Direct shear machine for testing rock joints
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1985Abstract Most direct shear machines are designed for soil testing or research and have serious limitations when used for rock joint testing by commercial testing laboratories. To overcome some of these limitations, a machine has been designed that uses split cylindrical specimen holders to encapsulate rock specimens in the field ...
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Direct Shear Test Simulations Using DEM
2020This paper provides insights into a series of two-dimensional numerical simulations of the direct shear test using the distinct element method (DEM). The DEM simulations were performed with different inter-particle friction coefficients maintaining the constant normal stress conditions to explore the stress-strain relationships.
Shiva Prashanth Kumar Kodicherla +4 more
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