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Showing 1 to 20 of 22 for “"dilatancy"”.
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Dilatancy : further studies in crystalline rock
Thesis. 1975. Ph.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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Improving Continuum Models for Excavations in Rockmasses Under High Stress Through an Enhanced Understanding of Post-Yield Dilatancy
… it is the post-yield phenomenon of rock dilatancy which has remained the domain of greatest uncertainty in constitutive models. Particularly in the case of brittle rockmasses, where deformation is dominated by crack extension and dilation, the post-yield evolution of dilatancy in parallel …
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Relationship of Acoustic Emission and Ultrasonic Velocity to Deformation Mechanisms and Dilatancy During the Ductile Deformation of Marble
Made available in DSpace on 2014-12-14T07:10:54Z (GMT). No. of bitstreams: 1 8004208.pdf: 3420261 bytes, checksum: dd6891879ff832eed322673a139d773f (MD5) Previous issue date: 1979
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Effects of maximum particle size and sample scaling on the mechanical behavior of mine waste rock; a critical state approach
… to be within 2° of the larger scale specimens. Dilatancy rates measured in conventional scale unweathered specimens was found to be, on average, approximately twice of that measured in the large-scale specimens of the same material. The weathered material indicated no significant changes in …
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Behaviour of locked sand during cavity expansion
… to the conventional understanding of the stress-dilatancy and drainage properties of sands. These deposits have a dense locked sand structure with high viscosity bitumen occupying a large portion of their void space. Steam Assisted Gravity Drainage is a method widely used for extraction of oil …
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A fundamental study of the flow of dilatant fluids
… and to propose a theory for the mechanism of dilatancy. In order that the correlation for flow of dilatant fluids in conduits could be tested it was necessary to build a flow apparatus from which pressure drops and flow rates could be measured, to develop viscometric equipment such that flow …
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From some obscurity to clarity in Boom clay behavior: Analysis of its coupled hydro-mechanical response in the presence of strain localization
… of the rock, commonly described through the dilatancy angle parameter. Correct estimation of the dilatant behavior of a rock has an essential role in a realistic simulation of its volumetric behavior, fracturing threshold during the rock deformation process and its post-failure response. …
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A computational framework for dynamic soil-structure interaction analysis
… features of sands such as path dependent dilatancy, hardening and softening, liquefaction, initial and induced anisotropy and that of clay are reproduced with unprecedented accuracy for a model of this simplicity.With regard to the computational framework, a general computational framework …
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The Influence of Pore Fluid on The Stability of a Rock Mass With a Weakened Zone
… in the stronger rock was possible, and this dilatancy was found to increase the ultimate strength and final failure time beyond the values at which the dry rock would fail. However, under in situ conditions at tectonic strain rates, the numerical analysis suggests that the presence of a pore …
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Computer simulation studies of dense suspension rheology. Computational studies of model sheared fluids; elucidation, interpretation and description of the observed rheological behaviour of simple colloidal suspensions in the granulo-viscous domain by Non-Equilibrium Particulate Dynamics.
… such as shear-thinning, shear thickening and dilatancy; (ii) to elucidate the different regions of a typical dense suspension rheogram by examining underlying structures and shear induced anisotropies in kinetic energy, diffusivity and pressure; (iii) to investigate the scaling of the simplest …
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Computer simulation of shear flow in simple fluids
… the difference between shear thinning and shear dilatancy, a point that has caused confusion in the rheological literature. Efficient computational methods are important as some simulations can take hundreds of hours of computer time. The arrival of a vector processor at the A.N.U. has …
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Computer simulation of shear flow in simple fluids
… the difference between shear thinning and shear dilatancy, a point that has caused confusion in the rheological literature. Efficient computational methods are important as some simulations can take hundreds of hours of computer time. The arrival of a vector processor at the A.N.U. has …
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THEORETICAL DETERMINATION OF THE YIELD CURVE FOR UNSATURATED SOILS
… to BBM is also proposed to handle the dilatancy observed in the undrained triaxial tests and modified unconfined compression tests on silty soil specimens"--Abstract, p. iv</p>
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Characterisation and behaviour of recycled concrete and bricks as engineered fill.
… at low normal stresses and the materials exhibit dilatancy at low normal stresses that decreases with increasing normal stress. This behaviour during shearing is similar to the behaviour exhibited by natural granular materials from literature. For all the three types of materials tested, the …
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Experimental and Numerical Study of Rubber Intermixed Ballast System Subjected to Monotonic and Cyclic Loading
… developed to explain fundamentally the stress-dilatancy behaviour of RIBS. In a practical perspective, the application of RIBS in real-life tracks is elucidated to encourage railway asset owners and R&D stakeholders to adopt and implement RIBS given its proven sound geotechnical and mechanical …
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Centrifuge modelling of the behaviour of geosynthetic-reinforced soils above voids
… zone above the void estimated from the soil dilatancy, rather than a single, unique coefficient of expansion in the deforming soil. The zone of subsidence was characterised by the combination of a vertical prism and funnel to the surface, with the surface settlement profile better described …
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Performance of Silty Sands and their Use in Flexible Airfield Pavement Design
… triaxial results combined with strength-dilatancy methods it was shown that prediction of shear strength in a silty-sand could be improved by 13%. Incorporating this finding into repeat load triaxial tests, the transitions between elastic, plastic, and ratcheting failure behaviours (i.e. …
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Creep behaviour of shallow foundations on sand and its implication to soil–structure interaction
… a creep period. The analysis of the stress–dilatancy behaviour reveals that the development of interlocking between sand particles during creep is the cause of these aging effects. At the foundation scale, an elasto-viscoplastic macro-element model that can simulate the time-dependent …
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Shear behaviour and stiffness of naturally cemented sands
… associated with a maximum rate of dilation. The dilatancy and strength of the intact soil were higher than those of the reconstituted soil at comparable states and were interpreted as resulting from differences in fabric and from the delayed volumetric response induced by the presence of bonding …
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Estudios de la convergencia por fluencia de túneles circulares en medios viscoelásticos plásticos
… is possible to use both a constant and a linear dilatancy law. This is an advantage because the last one does not have the risk of not complying with the irreversibility postulate of Praguer (1949), equivalent to the 2nd thermodynamic law, while the constant dilatancy law does have that risk when …
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