Auteur Ooi, J. Y.
Documents disponibles écrits par cet auteur (13)
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Kuhn, Matthew, Auteur ; Katalin Bagi, Auteur ; Ooi, J. Y., Éditeur scientifique |The paper presents a definition of rolling between a pair of two-dimensional or three-dimensional particles with a compliant contact. The definition of rolling movement is based upon the shapes of the objects’ surfaces as described with differen[...]
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Challa, Vennela, Auteur ; Issen, Kathleen A., Auteur ; Ooi, J. Y., Éditeur scientifique |Compaction bands, a form of localized deformation found in field and laboratory specimens of high porosity rock, consist of planar zones of pure compressional deformation that form perpendicular to maximum compression. Experimentalists report co[...]
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P.-Y. Hicher, Auteur ; C. S. Chang, Auteur ; Ooi, J. Y., Éditeur scientifique |This Paper discusses the capabilities of two homogenization techniques to accurately represent the elastic behavior of granular materials considered as assemblies of randomly distributed particles. The Stress strain relationship for the assembly[...]
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O'Sullivan, Catherine, Auteur ; Bray, Jonathan D., Auteur ; Riemer, Michael ; Ooi, J. Y., Éditeur scientifique |Significant insight into the response of granular materials can be gained by coupling accurately controlled physical tests with complementary discrete element simulations. This paper discusses a series of triaxial and plane strain laboratory com[...]
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Jeremy Lechman, Auteur ; Ning Lu, Auteur ; Wu, David ; Ooi, J. Y., Éditeur scientifique |The dependences of matric suction and capillary stress on the degree of saturation in monodisperse disk-shaped particles are established for the full range of the degree of saturation. A thermodynamic free energy approach is employed to obtain b[...]
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Lancelot, Laurent, Auteur ; Shahrour, Isam, Auteur ; Al Mahmoud, Marwan ; Ooi, J. Y., Éditeur scientifique |The behavior of Hostun RF sand on proportional strain paths at low confining pressures (20 to 100 kPa) is considered in this paper. In such paths, a constant dilation rate is imposed during shear. The usual features of pore pressure increase (co[...]
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Buick, J. M., Auteur ; Chavez-Sagarnaga, J., Auteur ; Zhong, Z. ; Ooi, J. Y. ; Pankaj ; Campbell, D. M. ; Greated, C. A. |Silo honking is an acoustical emission with a fundamental frequency of several hundred Hertz and a intensity often greater than 100 dB. It occurs when a silo is discharging and is simular to the "honk" of a lorry horn. The High amplitude of the [...]
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Tseng, Kevin K., Auteur ; Ooi, J. Y., Éditeur scientifique |Many materials exhibit elasto–visco–plastic behavior when subjected to loadings with certain strain rate. Examples include natural materials such as metals, clays, and soils and manmade materials such as some biomimic materials. Some voids may e[...]
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Suiker, Akke S. j., Auteur ; Chang, Ching S., Auteur ; Ooi, J. Y., Éditeur scientifique |A Novel mesoscale granular continuum model is derived by homogenizing the mechanical behavior of six particles in contact forming an octahedron structure. The elastic behavior at the particle contacts is simulated in accordance with Hertz theory[...]
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Paris, D. R., Auteur ; Masson, S., Auteur ; Martinez, J. ; Ooi, J. Y., Éditeur scientifique |A method for performing discrete element simulations of granular flow and pressures within industrial silos is presented. Special attention is devoted to complex problems involving large numbers of particles and sophisticated boundary conditions[...]
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Doolin, David M., Auteur ; Sitar, Nicholas, Auteur ; Ooi, J. Y., Éditeur scientifique |Discontinuous deformation analysis (DDA) is a discrete element method that was developed for computing large deformation in fractured rock masses. In this paper we present details of the DDA time integration scheme, where the acceleration is tak[...]
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Tang-Tat Ng, Auteur ; Ooi, J. Y., Éditeur scientifique |A new boundary condition has been developed for the discrete element method. This boundary is different from the conventional periodic, rigid, or flexible boundries. This new boundary mechanism was developed to simulate triaxial tests. The new [...]
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Jiang, Mingjing, Auteur ; Konrad, Jean-Marie ; Leroueil, Serge, Auteur ; Ooi, J. Y., Éditeur scientifique |The purpose of this paper is to present macro and micro study on the yielding of micro structured geomaterials by numerical experiments. This target is achieved by carrying out 63 one dimensional and biaxial compressions on an idealized bonded g[...]
