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Showing 1 to 20 of 374 for “"homogenization"”.
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Topology Optimization Using Load Path and Homogenization
<p>In this work, the connection between topology optimization and load transfer has been established. New methods for determining load paths in two dimensional structures, plates and shells are introduced. In the two-dimensional space, there are two load paths with their total derivative equal to …
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Homogenization and analysis of hydrological time series
… series before using it for any application. The homogenization of snow depth data, in particular, is a challenging task. Up to now, it has been performed analyzing available metadata, which often present contradictions and are rarely complete. In this work, we present a procedure to test the …
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Homogenization and dehomogenization schemes for BWR assemblies
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1983.
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Percolation and homogenization theories for heterogeneous materials
Most materials produced by Nature and by human beings are heterogeneous. They contain domains of different states, structures, compositions, or material phases. How these different domains are distributed in space, or in other words, how they connect to one another, determines their macroscopic …
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Multiscale strength homogenization : application to shale nanoindentation
… propose a two-scale non-linear procedure for the homogenization of their yield design strength properties, based on the Linear Comparison Composite Theory. At Level 0, the intrinsic friction of shales is captured via a cohesive-frictional strength criterion for the clay particles (Drucker-Prager). …
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On problems in homogenization and two-scale convergence
… two problems from the theory of periodic homogenization and the related notion of two-scale convergence. Its main focus rests on the derivation of equivalent transmission conditions for the interaction of two adjacent bodies which are connected by a thin layer of interface material being …
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Iterative and variational homogenization methods for filled elastomers
… a combination of novel iterative and variational homogenization techniques capable of accounting for interphasial phenomena and finite deformations. Exact and approximate analytical solutions for the fundamental nonlinear elastic response of dilute suspensions of rigid spherical particles (either …
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Scale-dependent homogenization of elastic-viscoelastic random composites
… on the investigation of the scale-dependent homogenization from a Statistical Volume Element (SVE) (i.e., mesoscale level) to a Representative Volume Element (RVE) (i.e., macroscale level) for linear viscoelastic random composites with perfectly bonded microconstituents. The theoretical …
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Homogenization of BWR assemblies by response matrix methods
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1981.
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Spatial homogenization methods for light water reactor analysis
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1980.
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A Study on Microstructures of Homogenization for Topology Optimization
… topology optimization method employing the homogenization method, with a focus on different microstructures and their effects on the topology optimization solutions. In the thesis, different microstructure models were investigated. The strengths and weaknesses of each type of microstructures …
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Homogenization of Partial Differential Equations with Random, Large Potential
… such as porous media and composite materials. Homogenization of PDE states that the solution of the initial model converges to the solution to a macro model, which is characterized by the PDE with homogenized coefficients. Particularly, we study PDEs with a large potential, a class of PDEs with …
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Space-Time Multiscale-Multiphysics Homogenization Methods for Heterogeneous Materials
We present a unified, homogenization framework for computational analysis of heterogeneous materials consisting of multiple length scales, multiple time scales and coupled-multiple physics. The research efforts also addresses the technological issues associated with modeling the morphological …
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Corrector Theory in Random Homogenization of Partial Differential Equations
… a theory for the correctors in random homogenization of partial differential equations with highly oscillatory coefficients, which arise naturally in many areas of natural sciences and engineering. This corrector theory is of great practical importance in many applications when …
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Numerical analysis of homogenization using random finite element method
The homogenized stiffness and permeability of geomaterials that are highly variable at the micro-scale has long been of interest to geotechnical engineers. This is especially true in petroleum geomechanics, where there has been a rapid growth of interest in the mechanics of unconventional resource …
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Scale-Dependent Homogenization and Scaling Laws in Random Polycrystals
The framework of stochastic mechanics is employed to obtain scale-dependent bounds on the response of multifarious random polycrystals. In doing so, one infers the approach to the Representative Volume Element (RVE), the cornerstone of the separation of scales in continuum mechanics. The RVE is …
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Temperature homogenization with tungsten absorber on X-ray mask
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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Review of random media homogenization using effective medium theories
… are not applicable to a particular problem. Homogenization of the random media using effective medium theories yields the effective propagation constants by effacing the particulate, microscopic nature of the medium. The Maxwell-Gamet and Bruggeman effective medium theories are widely used …
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Stochastic Homogenization of Nonconvex Hamilton-Jacobi Equations in One Dimension
… finance, and game theory. Stochastic homogenization is a phenomenon used to study the behavior of solutions to partial differential equations in stationary ergodic media, aiming to understand how these solutions average out or 'homogenize' over large scales. This process results in …
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Concrete microstructure homogenization technique with application to model concrete serviceability
… models being given progressively, an innovative homogenization model of concrete is proposed in which concrete is regarded as cement and aggregate particles connected by interfacial transition zone (ITZ). Defined on a representative volume element (RVE), the relationship between microstructure …
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