Global ETD Search
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Showing 1 to 18 of 18 for “"distinct element"”.
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Mesoscopic Distinct Element Method for Multiscale Modeling of Carbon Nanotubes
… models based on mesoscopic dintinct element method (mDEM). Our mDEM model is informed by atomistic data obtained with molecular dynamics (MD) and density functional theory-based tight-binding (DFTB) objective molecular modeling. Our mDEM model is capable of reproducing the atomistic …
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Distinct Element Modeling of the Shimizu Tunnel No.3 in Japan
… deformations and loads in the tunnel, the distinct element and the convergence-confinement methods were used during the numerical simulations. A parametric analysis was performed initially in a pseudo-continuum approach to study the behavior of the wide tunnel geometry under various …
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Distinct Element Simulation of the February 17th, 2006, Leyte, Philippines Rockslide
… 1,400 of the 1,800 residents of the village. The distinct element simulation of the rockslide is performed using 3DEC (Three-Dimensional Distinct Element Code) in order to investigate the underlying triggering mechanism of the slide as well as the behavior of the debris flow. The 3DEC models were …
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Coupled flow/deformation analysis of jointed rock with the distinct-element method
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1987.
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Study of fault gouge influences on mechanical and frictional behavior of granular shear zones using the distinct element method
… in "real time", the combination of the Distinct Element Method (DEM) and linear elastic contact bonds provides an opportunity to deform complex, heterogeneous granular assemblages that approximate natural shear zones in a more realistic way, and to study gouge deformation processes that …
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Dynamic simulation of particulate and molecular systems
… bimodal and Gaussian) are studied using the Distinct Element Method (DEM). The dissipative forces including viscoelastic and frictional contact forces between the colliding particles cause the energy loss during the packing process, and finally the particles agglomerations is formed. When the …
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Evaluation and Assessment of Inflow Rates in Tunnels Excavated in Jointed Rock Mass
… groundwater inflows were investigated using 2-D Distinct Element Method Program which can take into account the coupled hydro-mechanical behavior within the rock fractures. The main concluding points of the study can be summarized as follows: (1) The hydro-mechanical behavior of the ring of …
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Assessment of Rib Failure Mechanisms Using Discontinuum Mechanics Based Modeling Approach
… The results demonstrated the capacity of the distinct element modeling based bonded block models suitability for use in investigating coal rib stability and support requirements"--Abstract, p. iii</p>
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Numerical simulation of selected geologic processes based on Discrete Element Method
… modeling of geologic processes based on Discrete Element Method (DEM), including modeling of pull-apart basin development based on Particle Flow Code (PFC) and simulation of deformation and earthquake potential of Ordos Block (China) under present tectonic stress regime based on Universal Distinct …
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Distict element numerical modelling of volcanic debris avalanche emplacement geomechanics.
… To better understand emplacement processes, a distinct element numerical model is then created. Initial unbonded particulate avalanche simulations allow spatial/temporal variations in avalanche body stress, energy and deformation to be considered in relation to the development of characteristic …
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The grammar of Q : Q-particles and the nature of Wh-fronting, as revealed by the Wh-questions of Tlingit
… is not those operators themselves, but rather a distinct element that we label a 'Q(uestion)-particle'. In many languages, the Q-particle is phonologically empty, and so its role in various phenomena has not yet been recognized. Most importantly, careful study of these Q-particles reveals that …
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Integrated field investigation, numerical analysis and hazard assessment of the Portillo Rock Avalanche site, Central Andes, Chile
… potential of a recurring major rockslide. The distinct element code UDEC was used to evaluate the failure mechanism. Elasto-plastic modelling results showed that sliding and shearing along the bedding planes together with brittle fracturing and shearing through the toe of the slope likely had …
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Discrete Element Modeling of Railway Ballast for Studying Railroad Tamping Operation
… developing a simulation model using the Discrete Element Model (DEM), with the aim of optimizing the railroad tamping operation. A comprehensive literature review is presented showcasing the applicability of DEM techniques in modeling ballast behavior and its feasibility in studying the …
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'A divine centurie of spirituall sonnets': the religious sonnet in early modern England
… takes as its point of departure a certain key element of the early modern English religious sonnet as it is instantiated in or brought into relief by the sonnet practice of a particular author over the course of a century’s span: scriptural and poetic intersections in Lok; twinning and …
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Risposta sismica fuori piano di strutture murarie: gli effetti P-Delta in un approccio a macro-elementi
… presente lavoro presenta un’evoluzione the macro-elemento discrete che tiene conto degli effetti del secondo ordine (cosiddetti effetti P-Delta P-Δ) in grado di descriver la risposta di rocking di muri in muratura soggetti a carichi fuori dal proprio piano. In accordo con la strategia a …