Shear band analysis of granular materials considering effects of particle shape
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DOI: 10.1007/s00707-020-02771-y
Abstract: Biaxial simulation tests with flexible membrane boundaries and Cosserat theory are used to investigate the effect of the particle shape on the properties of a shear band of granular materials. Three kinds of special particle… read more here.
Keywords: shear band; granular materials; analysis; particle ... See more keywords
DEM modeling of shear bands in crushable and irregularly shaped granular materials
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DOI: 10.1007/s10035-017-0712-y
Abstract: A method of modeling convex or concave polygonal particles is proposed. DEM simulations of shear banding in crushable and irregularly shaped granular materials are presented in this work. Numerical biaxial tests are conducted on an… read more here.
Keywords: crushable irregularly; irregularly shaped; granular materials; shaped granular ... See more keywords
Evaluation of energy contributions using inter-particle forces in granular materials under impact loading
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DOI: 10.1007/s10035-017-0720-y
Abstract: A drop-tower based experimental setup was developed for the impact testing of 2D assembly of cylinders with impactor velocity of around 6 m/s. This drop tower setup was used to load 2D granular assemblies of polyurethane… read more here.
Keywords: granular materials; prime prime; inter particle; particle ... See more keywords
A general rotation averaging method for granular materials
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DOI: 10.1007/s10035-017-0722-9
Abstract: In order to study the rotational behavior of granular materials, rotation averaging methods are required. Most of the existing rotation averaging methods are only for 2D cases and limited by the shape, position and size… read more here.
Keywords: averaging method; rotation averaging; granular materials; general rotation ... See more keywords
Influence of packing density and stress on the dynamic response of granular materials
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DOI: 10.1007/s10035-017-0729-2
Abstract: Laboratory geophysics tests including bender elements and acoustic emission measure the speed of propagation of stress or sound waves in granular materials to derive elastic stiffness parameters. This contribution builds on earlier studies to assess… read more here.
Keywords: granular materials; packing density; density; stress ... See more keywords
Image based shape characterization of granular materials and its effect on kinematics of particle motion
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DOI: 10.1007/s10035-017-0776-8
Abstract: Quantification of particle shape features to characterize granular materials remains an open problem till date, owing to the complexity involved in obtaining the geometrical parameters necessary to adequately compute the shape components (sphericity, roundness and… read more here.
Keywords: methodology; image; shape; granular materials ... See more keywords
Mobility in granular materials upon cyclic loading
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DOI: 10.1007/s10035-018-0838-6
Abstract: We investigate the ability to move of large objects—referred to as intruders—embedded in a granular material and subjected to cyclic loadings. A discrete element method is used to simulate the dynamics response of intruders subjected… read more here.
Keywords: mobility; granular materials; upon cyclic; cyclic loading ... See more keywords
Rate-dependent drag instability in granular materials
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DOI: 10.1007/s10035-020-01039-5
Abstract: We investigate the conditions leading to large drag force fluctuations in granular materials. The study is based on a set of experimental drag tests, which involve pulling a plate vertically through a cohesionless granular material.… read more here.
Keywords: granular materials; dependent drag; rate dependent; drag ... See more keywords
DEM simulation of anisotropic granular materials: elastic and inelastic behavior
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DOI: 10.1007/s10035-020-01052-8
Abstract: In this work, Discrete Elements Method simulations are carried out to investigate the effective stiffness of an assembly of frictional, elastic spheres under anisotropic loading. Strain probes, following both forward and backward paths, are performed… read more here.
Keywords: anisotropic granular; dem simulation; granular materials; materials elastic ... See more keywords
Thermal cycling effects on the structure and physical properties of granular materials
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DOI: 10.1007/s10035-020-01054-6
Abstract: Over the past two decades, various investigations have shown that the application of thermal cycles of heating and cooling to granular materials causes permanent densification. However, prior to this study, significant associated effects of thermal… read more here.
Keywords: granular materials; thermal cycling; number; thermal cycles ... See more keywords
Characterizing the feasibility of processing wet granular materials to improve rheology for 3D printing
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DOI: 10.1007/s10853-017-1404-z
Abstract: Rheological measurements and extrusion tests are used to evaluate the viability of high mass fraction (80% solids content) wet granular materials for extrusion-based 3D printing. Such materials have diverse applications from making dense, strong ceramic… read more here.
Keywords: granular materials; rheology; printing; wet granular ... See more keywords