IUTAM Symposium on Mechanics of Granular and Porous Materials

This volume constitutes the Proceedings of the IUT AM Symposium on Mechanics of Granular and Porous Materials, held in Cambridge from 15th to 17th July 1996. The objectives were: 1. To review existing experimental results and practical phenomena on the flow and compaction of particulate media; 2. To review the current state of constitutive models, and their implementation for predicting the macroscopic response. 3. Identification of the shortcomings of existing models and procedures in understanding practical phenomena. The Symposium brought together the research communities of solid mechanics, materials science, geomechanics, chemical engineering and mathematics to review current knowledge of the flow and compaction of granular and porous media. The meeting emphasised the development and use of constitutive laws to model practical processes such as mixing, drainage and drying, compaction of metal and ceramic powders and soils, and instabilities associated with these processes. A common theme was to develop constitutive models from an understanding of the underlying physical mechanisms of deformation and fracture. It was particularly rewarding to find that the separate research communities came together during the meeting and came to a consensus as to the main mechanisms of deformation and failure of particulate and porous solids.

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Preface. Constitutive Models. The Viscoplastic Compaction of Powders; N.A. Fleck, et al. Inelastic Behaviour of Random Arrays of Identical Spheres; J.T. Jenkins. Fractal Fragmentation and Frictional Stability in Granular Materials; C.G. Sammis. Clastic Mechanics; M.D. Bolton, G.R. McDowell. Compressible Porous Media: Toward a General Theory; R. de Boer. Mechanical Behaviour of Mixtures of Kaolin and Coarse Sand; G.V. Kumar, D.M. Wood. Constitutive Modelling of Response of Granular Interface Layers; Z. Mróz. A Characteristic State Plasticity Model for Granular Materials; S. Krenk. On the Constitutive Potential for Powder and Porous Bodies; M. Shtern. Scaling Laws in the Consolidation of Powder Compacts; A. Casagranda, P. Sofronis. Constitutive Equation for Compaction of Ceramic Powders; N.D. Cristescu, et al. A Constitutive Model for the Sintering of Fine Grained Alumina; M. Jan, A.C.F. Cocks. Importance of Incremental Nonlinearity in the Deformation of Granular Materials; Y. Tobita. The Use of Legendre Transformations in Developing the Constitutive Laws of Geomechanics from Thermodynamic Principles; I.F. Collins. Derivation of Incremental Stress-Strain Response for Plasticity Models Based on Thermodynamic Functions; G.T. Houlsby. Contact Mechanics and Computational Methods. Local Contact Behaviour of Viscoplastic Particles; B. Storåkers. Cement Among Grains in Rocks; J. Dvorkin. Three Dimensional Discrete Mechanics of Granular Materials; M. Satake. Numerical Analysis of Clay Particle Assemblies; A. Anandarajah. On Gradient-Enhanced Damage Theories; R. de Borst, et al. Granular Flow: Theory and Applications. Remarks on Coaxiality in FullyDeveloped Gravity Flows of Dry Granular Materials; A.J.M. Spencer. Modelling Mathematically the Flow of Granular Materials; D. Harris. The Double-Shearing Velocity Equations for Dilatant Shear-Index Granular Materials; J.M. Hill. Distinct Element Simulations and Dynamic Microstructural Imaging of Slow Shearing Granular Flows; U. Tüzün, D.M. Heyes. Granular Avalanches on Complex Topography; J.M.N.T. Gray. Tracking Particles in Tumbling Containers; G. Metcalfe. On the Reality of Antisymmetric Stresses in Fast Granular Flows; H.-B. Mühlhaus, P. Hornby. Internal Friction Angles: Characterization Using Biaxial Test Simulations; D. Corriveau, et al. A Mechanistic Model for Attrition of Particles in Flow Systems; D.C. Clupper, et al. Instabilities. Simple Shear of Porous Materials at Large Strains; D. Durban, O. Yagel. Formation of Shear Bands in Models of Granular Material; M. Shearer, et al. Microstructure Developed in Shear Bands of Dense Granular Soils and its Computer Simulation &endash; Mechanisms of Dilatancy and Failure; M. Oda, et al. The Evolution of Anisotropy in Porous Materials and its Implications for Shear Localization; M. Kailasam, P.P. Castañeda. Shear Band Localization in Fluid-Saturated Granular Elasto-Plastic Porous Media; W. Ehlers. Applications. Consolidation of Metal Coated Fibres; H.N.G. Wadley, J.M. Kunze. Analysis for Die Compaction of Metal Powders; K.T. Kim, et al. The Modelling of the Influence of Wall Friction on the Characteristics of Pressed Ceramic Parts; S.A. Watson, et al. Drainage and Drying of Deformable Porous Materials: One-Dimensional Case Study; P. Dangla, O. Coussy. Mechanics of Sand Production for Acting Wells; S.B. Grafutko, V.N. Nikolaev