The interface problem exists widely in building. Joints are interfaces of rock mass structures. To further study the influence morphological characteristics on shear mechanical properties sawtooth joints, this paper prepared rock-like materials based similarity principle and carried out direct tests joints. results showed that: (1) peak displacement joints first increases then decreases with in...

The estimation of terrain characteristics is an important missions of Martian exploration rovers. Since only limited resources and human supervision are available, efficient and autonomous method of estimation are required. In this thesis, an on-line estimation method of two important terrain parameters, cohesion and internal friction angle, is developed. The method uses onboard rover sensors a...

Abstract In order to meet environmental and socio-economic challenges, the recycling of waste be used in treatment geotechnical problems is one main ways preserving environment with a lower economic value. The objective this experimental work improve characteristics study mechanical behaviour collapsible soil treated new hydraulic stabilizer composed Crushed Granulated Blast Furnace Slag (CGBS)...

SYNOPSIS The properties and deterioration in strength of cemented tailings backfill (CTB )in the underground acidic environment under oxidizing conditions were studied. X-ray diffraction analysis scanning electron microscopy surface CTB was carried out, sulphuric acid corrosion mechanism elucidated. tested included compressive strength, elastic modulus, cohesion, internal friction angle, variat...

ABSTRACT: It may be said that the shape of sand deposition is normally cone and sand grains are oriented a certain angle of deposition repose is made. This angle is such that no stability occurs. Thus the angle of repose is somewhat correlated to the sand internal friction angle. This paper presents the results of a series of laboratory experiments performed three types of sand. For this purpos...

Here, we investigate the ultrastructural origins of the strength of bone, which is critical for proper physiological function. A combination of dual nanoindentation, three-dimensional elastic-plastic finite element analysis using a Mohr-Coulomb cohesive-frictional strength criterion, and angle of repose measurements was employed. Our results suggest that nanogranular friction between mineral pa...

The pre-peak microstructure evolution of the material is crucial in determining strength and failure scheme material, but not captured by existing shear parameters models which focus on post-peak stage information. Novel concepts pseudo-cohesion pseudo-internal friction angle that account for both information were proposed this study, based experimentally observed response rock mechanics to an ...

In contrast to most fluids, flowing powders do not exhibit viscosity such that a Newtonian rheology cannot accurately describe granular flow. Assuming that the material is incompressible, dry, cohesionless, and perfectly rigid-plastic, generalized Navier-Stokes equations (’Schaeffer Model’) have been derived where the velocity gradient has been replaced by the shear rate, and the viscosity depe...

in this paper, the direct extrusion process of bimetallic rods in conical dies is analyzed by an improved upper bound method. the deformation zone is subdivided into six smaller zones and by considering a non-spherical entrance boundary to the deformation zone, a velocity field is presented which is different from velocity fields employed in previous studies. the total power consumption of the ...

In the process of rice harvesting, passability track combine harvester is often limited by state soil. Meanwhile, wet and soft paddy soil compacted under rolling harvesting machinery, which also affects function ecological environment. Therefore, relationship between physical mechanical properties was studied in this paper. addition, compaction from a on field with without stubble studied. The ...