Results 221 to 230 of about 83,954 (263)
Some of the next articles are maybe not open access.
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 ...
openaire +1 more source
A numerical examination of the direct shear test
Géotechnique, 2007The paper presents results of two-dimensional simulations of the direct shear test using the discrete element method (DEM). The heterogeneous distributions of stress and strain are illustrated and, taking advantage of the numerical technique, the evolution of the stress tensor and porosity changes in the shear zone are monitored.
L. zhang, C. Thornton
openaire +1 more source
Numerical Simulations of the Direct Shear Test
Chemical Engineering & Technology, 2003AbstractNumerical simulations of the direct shear test have been performed under constant normal stress conditions, using the Discrete Element Method. Results are presented to show how the average shear to normal stress ratio acting on the shear band compares with the force data at the boundaries.
C. Thornton, L. Zhang
openaire +1 more source
Geophysical Characterization of Shear Zone in Direct Shear Test
2011Shear behavior of granular soils largely affects the safety and stability of underground and earth structures. This study presents the characteristics of the shear zone in a direct shear test using shear wave and electric resistivity measurements. An innovative direct shear box made of transparent non-conductive acrylic material has been developed to ...
Byun Yong-Hoon +3 more
openaire +1 more source
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
openaire +1 more source
Use of Borehole Shear Test to Obtain Shear Strength Data Comparison to Direct Shear Test
2018The knowledge of shear strength geotechnical parameters, cohesion and friction angle, is necessary for many engineering works and slope stability analysis. Traditionally, the Direct Shear Test (DST) in the laboratory is used to determine these parameters.
R. M. Sbroglia +4 more
openaire +1 more source
Direct shear testing of seeds in bulk
Journal of Agricultural Engineering Research, 1980Abstract To apply existing theories to the prediction of wall pressures in the structures for the storage of agricultural seeds it is necessary to know the shear properties of the materials to be stored. Equipment already used in soil engineering is unsuitable because of the lower stresses involved in testing seeds and the larger particle sizes.
P.J. Lawton, J.A. Marchant
openaire +1 more source
Direct Shear Testing of Rockfill Material
Soil and Rock Behavior and Modeling, 2006The shear strength of granular materials is mainly derived from the particle sliding friction and resistance resulting from reorientation and sample dilatancy. Parameters affecting the shear strength therefore depend on the relative density, gradation, particle strength, particle size and shape, and degree of saturation of the specimen. In this study a
Xinbao Yu, Shunying Ji, Kerop D. Janoyan
openaire +1 more source
Shear Strength of an Accumulation Soil from Direct Shear Test
Marine Georesources & Geotechnology, 2014The present study focuses on the shear strength of the loose accumulation soil induced by the 2008 Sichuan earthquake. A series of direct shear box tests was performed to characterize the shear strength of the accumulation soil, under drained conditions.
Jun-Jie Wang +3 more
openaire +1 more source