Publications
224 results found
Latham JP, Mindel J, Xiang J, et al., 2008, Development of a modelling approach for large granular media used in coastal applications, Discrete Element Methods and Numerical Modelling of Discontinuum Mechanics, Pages: 122-130
Schiava D'Albano GG, Munjiza A, Rougier E, et al., 2008, Fluid driven fracture processes in FEM/DEM analysis, Discrete Element Methods and Numerical Modelling of Discontinuum Mechanics, DEM'08, Pages: 242-248
Guises R, Munjiza A, Xiang J, et al., 2007, Granular packing: numerical simulation and the characterisation of the effect of particle shape, Fourth International Conference on Discrete Element Methods
Xiang J, Munjiza A, Latham JP, 2007, On the validation of DEM and FEM/DEM models in 2D and 3D, Fourth International Conference on Discrete Element Methods
Latham JP, Munjiza A, Garcia X, et al., 2007, Highly resolved particle shape for DEM and FEM/DEM simulation, Fourth International Conference on Discrete Element Methods
Latham JP, Munjiza A, Mindel J, et al., 2007, Towards simulation of concrete armour unit breakage under wave loads using coupled DEM, FEM/DEM and CFD, Fourth International Conference on Discrete Element Methods
Latham J-P, Van Meulen J, Dupray S, 2006, Prediction of fragmentation and yield curves with reference to armourstone production, ENGINEERING GEOLOGY, Vol: 87, Pages: 60-74, ISSN: 0013-7952
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- Citations: 21
Latham J-P, Lienhart D, Dupray S, 2006, Rock quality, durability and service life prediction of armourstone, ENGINEERING GEOLOGY, Vol: 87, Pages: 122-140, ISSN: 0013-7952
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- Citations: 21
Latham J-P, Van Meulen J, Dupray S, 2006, Prediction of in-situ block size distributions with reference to armourstone for breakwaters, ENGINEERING GEOLOGY, Vol: 86, Pages: 18-36, ISSN: 0013-7952
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- Citations: 38
Latham JP, Van Meulen J, Dupray S, 2006, The specification of armourstone gradings and EN 13383 (2002), QUARTERLY JOURNAL OF ENGINEERING GEOLOGY AND HYDROGEOLOGY, Vol: 39, Pages: 51-64, ISSN: 1470-9236
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- Citations: 9
Mezentsev AA, Munjiza A, Latham JP, 2005, Unstructured computational meshes for subdivision geometry of scanned geological objects, Pages: 73-89
This paper presents a generic approach to generation of surface and volume unstructured meshes for complex free-form objects, obtained by laser scanning. A four-stage automated procedure is proposed for discrete data sets: surface mesh extraction from Delaunay tetrahedrization of scanned points, surface mesh simplification, definition of triangular interpolating subdivision faces, Delaunay volumetric meshing of obtained geometry. The mesh simplification approach is based on the medial Hausdorff distance envelope between scanned and simplified geometric surface meshes. The simplified mesh is directly used as an unstructured control mesh for subdivision surface representation that precisely captures arbitrary shapes of faces, composing the boundary of scanned objects. CAD model in Boundary Representation retains sharp and smooth features of the geometry for further meshing. Volumetric meshes with the MezGen code are used in the combined Finite-Discrete element methods for simulation of complex phenomena within the integrated Virtual Geoscience Workbench environment (VGW). © 2005 Springer-Verlag Berlin Heidelberg.
Mezentsev AA, Munjiza A, Latham JP, 2005, Unstructured computational meshes for subdivision geometry of scanned geological objects, Berlin, 14th international meshing roundtable meeting SEP 11-14, 2005 San Diego, CA, Publisher: Springer-Verlag Berlin, Pages: 73-89
Latham JP, Munjiza A, 2004, The modelling of particle systems with real shapes, PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, Vol: 362, Pages: 1953-1972, ISSN: 1364-503X
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- Citations: 103
Munjiza A, Latham JP, 2004, Some computational and algorithmic developments in computational mechanics of discontinua, PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, Vol: 362, Pages: 1817-1833, ISSN: 1364-503X
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- Citations: 12
Dupray S, Latham J-P, 2004, Proposal of a full-scale destructuctive test method to assess integrity of natural armourstone, Coastal Structures 2003 (2003: Portland, Or), Publisher: American Society of Civil Engineers, Pages: 150-162
Latham J-P, Stewart T, Newberry S, 2004, Effects of rock shape on packing and stability of rock armour: new guidance, Coastal Structures 2003 (2003: Portland, Or), Publisher: American Society of Civil Engineers, Pages: 163-175
Dupray S, Durville JL, Latham JP, 2004, Proposition d'une methode d'essai destructive in-situ pour la caracterisation de l'integrite des enrochements naturels utilises dans les ouvrages hydrauliques, Proceedings journees nationales de genie civil et de genie cotier - Compiegne, France
Munjiza A, Latham J-P, 2004, Comparison of experimental and numerical results for gravitational deposition of identical cubes, Int. J. Engineering Computations, Vol: 21, Pages: 249-265
Latham JP, Kemeny J, Maerz N, et al., 2004, A blind comparison between results of four image analysis systems using a photo-library of piles of sieved fragments, Fragblast, Vol: 7, Pages: 105-132, ISSN: 1385-514X
Rougier E, Munjiza A, Latham JP, 2004, Shape selection menu for grand scale discontinua systems, Engineering Computations, Vol: 21, Pages: 343-359, ISSN: 0264-4401
Munjiza A, Latham JP, 2004, Comparison of experimental and FEM/DEM results for gravitational deposition of identical cubes, 3rd International Conference on Discrete Element Methods, Publisher: EMERALD GROUP PUBLISHING LIMITED, Pages: 249-264, ISSN: 0264-4401
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- Citations: 18
Munjiza A, Latham JP, John NWM, 2003, 3D dynamics of discrete element systems comprising irregular discrete elements - integration solution for finite rotations in 3D, INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, Vol: 56, Pages: 35-55, ISSN: 0029-5981
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- Citations: 61
Latham JP, Munjiza A, 2003, POROSITY and PACKING SIMULATIONS of PARTICLES with ANY SHAPE or SIZE-DYNAMIC 3D RESULTS, Pages: 1424-1435, ISSN: 0161-3782
For many years, coastal engineers have used computational modeling tools based on continuum mechanics, to model fluid flow and to a lesser extent solid structure deflections and deformations. However, problems in coastal engineering are often concerned with the movement of discrete bodies and there is an entirely new breed of discontinuum modelling methods (DEM, FEM/DEM and DDA), designed to simulate body interactions. This paper considers the range of particulates that concern coastal engineers, discusses DEM applications generally before reporting on some modelling developments showing dynamically interacting realistic-shaped bodies in which the fluid behaviour is neglected. These numerical modelling developments are based on the combined discrete finite element method (FEM/DEM). The paper concludes with a brief discussion on future progress and opportunities.
Newberry SD, Latham JP, Stewart T, et al., 2003, THE EFFECT of ROCK SHAPE and CONSTRUCTION METHODS on ROCK ARMOUR LAYERS, Pages: 1436-1448, ISSN: 0161-3782
It is recognised that thickness and void porosity of armour layers in rock armoured structures has a significant effect on the details of measurement and payment in contracts. Data from full-scale structures and model replications are examined to provide guidance on the range and average values of thickness and porosity that might be expected for a given Dn50 of armourstone. The paper then takes a detailed look at the relations between the armourstone shape characteristics, construction methods and the resulting thicknesses and void porosities. The results presented are from a comprehensive set of dry model construction tests designed primarily to explore the effects of block shape rather than to model a specific breakwater or revetment. These generic tests introduce the "blockiness coefficient" to help quantify the most influential block shape effects. Results are compared with findings from full-scale structures and it is concluded that both laboratory and full-scale coefficients for void porosity and thickness can be adequately predicted provided the shape of rock armour pieces is quantified with the aid of the blockiness coefficient as well as the axial ratio (1/d).
Stewart TP, Newberry SD, Simm JD, et al., 2003, THE HYDRAULIC PERFORMANCE of TIGHTLY PACKED ROCK ARMOUR LAYERS, Pages: 1449-1461, ISSN: 0161-3782
This paper examines the hydraulic performance of armour layers made up of individually placed, tightly packed rocks. It uses the results of physical model tests to examine the ability of such layers to resist damage from wave attack and to limit overtopping discharge. Single and double layers are investigated. The performance of the structures is compared with the predictions of Van der Meer's stability and overtopping formulae.
Munjiza A, Latham JP, 2003, Computational and algorithmic challenge of modelling discontinua, 3rd Int. Conf. On Discrete Element Methods, Pages: 5-10
Latham JP, Munjiza A, Rougier E, 2003, A virtual discontinua modelling workbench for geosciences, 6th International Conference on Analysis of Discontinuous Deformation, Publisher: A A BALKEMA PUBLISHERS, Pages: 169-174
Munjiza A, Bonaparte A, Rougier E, et al., 2003, Parallel, distributed and grid computing in discontinua analysis, 6th International Conference on Analysis of Discontinuous Deformation, Publisher: A A BALKEMA PUBLISHERS, Pages: 39-42
Munjiza A, Latham J-P, 2003, Computational Challenge of Large Scale Discontinua Analysis, Proceedings 3rd Int. Conference on Discrete Element Methods, Publisher: ASCE, Pages: 5-10
Latham JP, Newberry S, Mannion M, et al., 2002, The void porosity of rock armour in coastal structures, PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-WATER AND MARITIME ENGINEERING, Vol: 154, Pages: 189-198, ISSN: 1472-4561
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- Citations: 6
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