A combined finite‐discrete element method in transient dynamics of fracturing solids

Munjiza, Ante; Owen, D. R. J.; Bícanić, Nenad

doi:10.1108/02644409510799532

Cited by 592 publications

(268 citation statements)

References 14 publications

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“…Munjiza et al [95] developed a method for the simulation of fracturing problems considering deformable blocks that may split and separate during the analysis. Mamaghani et al [81] used a fixed contact system with a small deformation framework and finite deformations concentrated in contact elements.…”

Section: Discrete Element Methodsmentioning

confidence: 99%

Structural Analysis of Masonry Historical Constructions. Classical and Advanced Approaches

Roca

Cervera

Gariup

et al. 2010

Arch Computat Methods Eng

543

255

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A review of methods applicable to the study of masonry historical construction, encompassing both classical and advanced ones, is presented. Firstly, the paper offers a discussion on the main challenges posed by historical structures and the desirable conditions that approaches oriented to the modeling and analysis of this type of structures should accomplish. Secondly, the main available methods which are actually used for study masonry historical structures are referred to and discussed.The main available strategies, including limit analysis, simplified methods, FEM macro-or micro-modeling and discrete element methods (DEM) are considered with regard to their realism, computer efficiency, data availability and real applicability to large structures. A set of final considerations are offered on the real possibility of carrying out realistic analysis of complex historic masonry structures. In spite of the modern developments, the study of historical buildings is still facing significant difficulties linked to computational effort, possibility of input data acquisition and limited realism of methods. P. Roca ( ) · M. Cervera · G. Gariup

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Section: Discrete Element Methodsmentioning

confidence: 99%

Structural Analysis of Masonry Historical Constructions. Classical and Advanced Approaches

Roca

Cervera

Gariup

et al. 2010

Arch Computat Methods Eng

543

255

View full text Add to dashboard Cite

show abstract

“…Since the active pharmaceutical ingredient and various excipient materials typically are handled and processed in powdered form during pharmaceutical development and manufacturing, it is evident that powder technology underlies many important unit operations, especially for the generally preferred solid oral dosage forms (tablets and tablet-like delivery vehicles). The most versatile computational procedures that may be used to model these processes are based on the distinct-particle approach, using either the classical discrete (or distinct) element (DE) method (Cundall and Strack, 1979) or the combined finite/discrete element (FE/DE) method (Munjiza et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Compression mechanics of granule beds: A combined finite/discrete element study

Frenning

2010

Chemical Engineering Science

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Compression of three-dimensional beds comprising of 1000 plastically deforming initially spherical granules is investigated by using the combined finite/discrete element (FE/DE) method. The material model is formulated within the framework of multiplicative plasticity, and utilizes a density-dependent elliptic yield surface that allows porous particles to both deform and to densify plastically, whereas only volume-preserving plastic deformation is possible for nonporous ones. Granules with different characteristics (yield stress and initial porosity) are studied, and the relationship between the single-granule properties and the global compression behaviour of the granule bed is investigated. It is demonstrated that the FE/DE method may shed light on the deformation and densification behaviour of individual granules, since the size and shape of each granule are continually determined as an integral part of the solution procedure, and that the method thus provides a comprehensive picture of the processes occurring during confined compression of granular materials.

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“…Traditionally this contacts are computed for all possible data pairs in order to reduce computational time. In this work, the efficient procedure described by [41] has been used, checking particle contacts only with the closest particles and/or boundaries.…”

Section: Numerical Solutionmentioning

confidence: 99%

Numerical sedimentation particle-size analysis using the Discrete Element Method

Bravo

Pérez-Aparicio

Gómez‐Hernández

2015

Advances in Water Resources

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Sedimentation processes are generally modelled using an equivalent continuum approach based on the coupling of the Navier-Stokes and the advection-dispersion equations; the sediment concentration within an elementary fluid volume is the variable of interest. Continuous advances in computational capabilities have brought up a new type of modelling that simulates the individual motion and contact interactions of grains: the Discrete Element Method (DEM). In this work, DEM interacts with the simulation of flow using the well known one-way-coupling method, a computationally affordable approach for the time-consuming numerical simulation of the ASTM-D422, buoyancy and pipette sedimentation tests. These tests are used in the laboratory to determine the particle-size distribution of fine-grained aggregates. Five samples with different particle-size distributions are modelled by about six million rigid spheres projected on two-dimensions, with diameters ranging from 2.5 × 10 −6 m to 70 × 10 −6 m, forming a water suspension in a sedimentation cylinder. DEM simulates the particle's movement considering laminar flow interactions of hydrostatic thrust, drag and lubrication forces. The simulation provides the temporal/spatial distributions of densities and concentrations of the suspension.The numerical simulation cannot replace the laboratory tests since it needs the final granulometry as initial data; but, as the results show, these simulations can identify the strong and weak points of each method and eventually recommend useful variations and draw conclusions on their validity, aspects very difficult to achieve in the laboratory.

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A combined finite‐discrete element method in transient dynamics of fracturing solids

Cited by 592 publications

References 14 publications

Structural Analysis of Masonry Historical Constructions. Classical and Advanced Approaches

Structural Analysis of Masonry Historical Constructions. Classical and Advanced Approaches

Compression mechanics of granule beds: A combined finite/discrete element study

Numerical sedimentation particle-size analysis using the Discrete Element Method

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