Numerical Modelling of Discontinua

Cundall, P.A.; Hart, R.D.

doi:10.1108/eb023851

Cited by 523 publications

(209 citation statements)

References 28 publications

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“…An interface has the properties of friction, cohesion, dilation, normal stiffness and shear stiffness, and tensile strength. The contact logic for either side of the interface is similar to that employed in the distinct element method (e.g., Cundall and Hart, 1992).…”

Section: Theoretical Basismentioning

confidence: 99%

The geological and geodynamic condition on the formation of the Dabashan thrust nappe structure: Based on FLAC numerical modelling

Zhang¹,

Dong²

2016

Earth sci. res. j.

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The Dabashan thrust nappe structure at the southern margin of the Qinling orogenic belt suffered at least two stages of evolution which are Late Triassic plate subduction collisional orogeny between North China block, Qinling micro-plate and Yangtze block followed by intracontinental orogeny since the Meso-Cenozoic. A prominent topography characteristic within the Dabashan area is a southwestward extrusive arc (Bashan Arc fault) that is one of key factors to understand the geodynamic condition of the Dabashan thrust nappe structure.In this work, two-dimensional plan-view models are constructed to simulate the collisional and intracontinental orogenic movements, and the factors that may control the formation of the Bashan Arc fault are analysed. The modelling results show that the compressive stress produced by the plates collision along both north and south boundaries is the main driving force. The dextral shearing derived from the inconsistent shape on the block margins is the main controller. Rigid tectonic units such as Bikou and Hanan-Micangshan terranes, Foping and Wudang domes, as well as Shennongjia-Huangling anticline also contribute as "anchor" effects. Additionally, the rheology properties of rock material in the Dabashan area affect the shape of the arc.La estructura de la falla de cabalgamiento de las montañas Dabashan en el margen sur del cinturón orogénico de Qinling sufrió por lo menos dos etapas de evolución, la colisión orogénica del Triásico Superior entre el bloque de la China del Norte, la microplaca de Qinling y el bloque Yangtze, y la orogénesis intracontinental desde el Meso-Cenozoico. Una característica topográfica prominente del área de Dabashan es un arco extrusivo (falla Arco de Bashan) hacia el suroeste, que es un factor determinante para entender la condición geodinámica de la falla de cabalgamiento en las montañas Dabashan. En este trabajo se construyeron modelos bidimensionales planos para simular los movimientos de colisión e intracontinental orogénicos y se analizaron los factores que podrían controlar la formación de la falla del Arco de Bashan. Los resultados del modelado muestran que el esfuerzo de compresión producido por las placas de colisión en los límites norte y sur es la principal fuerza impulsora de la falla. La principal controladora es la fuerza de cizallamiento dextral derivada de la forma inconsistente en los margenes del bloque. Las unidades tectónicas rígidas como los terrenos Bikou y HananMicangshan, el domo Foping y Wudang, al igual que el anticlinal Shennongjia-Huangling tienen funciones de ancla. Adicionalmente, las propiedades reológicas del material rocoso en el área Dabashan afectan la forma del arco. Condición geológica y geodinámica para la formación estructural de la falla de cabalgamiento en las montañas Dabashan basada en el modelo numérico del software FLAC B2 Xiaoning Zhang and Yunpeng Dong. ABSTRACT RESUMEN

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Section: Theoretical Basismentioning

confidence: 99%

The geological and geodynamic condition on the formation of the Dabashan thrust nappe structure: Based on FLAC numerical modelling

Zhang¹,

Dong²

2016

Earth sci. res. j.

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“…These methods would be later developed and revised (Cundall & Strack 1979, 1983Cundall 1988;Hart et al 1988) to aid in the study and analysis of a wide range of physical systems. Cundall (Cundall & Hart 1992) performs a review of the simulation methods and makes a proposal to define what constitutes a discrete element program, and four classes of such programs are described: the distinct element method (DEM), modal methods, discontinuous deformation analysis, and the momentum-exchange method. The first method would become what we know today as soft-sphere discrete element method (SSDEM), and the last one is known today as hard-sphere discrete element method (HSDEM).…”

Section: Dem Simulationsmentioning

confidence: 99%

Simulating Asteroid Rubble Piles With a Self-Gravitating Soft-Sphere Distinct Element Method Model

Sánchez¹,

Scheeres²

2011

ApJ

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This paper applies a soft-sphere distinct element method Granular Dynamics code to simulate asteroid regolith and rubble piles. Applications to regolith studies in low gravity are also studied. Then an algorithm to calculate self-gravity is derived and incorporated for full-scale simulations of rubble-pile asteroids using Granular Dynamics techniques. To test its validity, the algorithm's results are compared with the exact direct calculation of the gravitational forces. Further avenues to improve the performance of the algorithm are also discussed.

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“…It is important to differentiate those sections where the geometry of the seeds would deform significantly, because in this stage of our research, the elements cannot be deformed [3]. In this model every seed is simulated as a ball, so we cannot study them at their highly deformed state with the current material model.…”

Section: Simulating the Oil Pressmentioning

confidence: 99%

Development of discrete element simulation method of vegetable oil press

Földesi¹,

Rádics²,

Kismányoky³

et al. 2011

Per. Pol. Mech. Eng.

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During the process of plant oil extraction major part of the power input transforms into thermal energy caused by friction. The evolved heat has a very significant effect on the quality of the oil. Our aim is to approach the real pressure and thermal phenomenon with the support of discrete element method (DEM) simulations. In the present stage of our research we have created a model with more complex geometry which represents the next stage of the evolutionary model development. The article presents our newest results.Keywords oil press · DEM simulation · heat evolution · granular material Acknowledgement This work is connected to the scientific program of the " Development of qualityoriented and harmonized R+D+I strategy and functional model at BME" project.

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Numerical Modelling of Discontinua

Cited by 523 publications

References 28 publications

The geological and geodynamic condition on the formation of the Dabashan thrust nappe structure: Based on FLAC numerical modelling

The geological and geodynamic condition on the formation of the Dabashan thrust nappe structure: Based on FLAC numerical modelling

Simulating Asteroid Rubble Piles With a Self-Gravitating Soft-Sphere Distinct Element Method Model

Development of discrete element simulation method of vegetable oil press

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