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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 84 for “"constitutive relations"”.
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A Class of Constitutive Relations for Solids
Made available in DSpace on 2014-12-04T23:11:06Z (GMT). No. of bitstreams: 1 6206234.pdf: 2137340 bytes, checksum: 03d6eb4d52eb73bd352321823450a204 (MD5) Previous issue date: 1962
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Three-dimensional constitutive relations of aligned carbon nanotube polymer nanocomposites
We have created a set of decision support tools to streamline the surgical case scheduling process by allowing surgical wait list cases (elective cases that cannot be assigned a slot on the operating room schedule at the time of booking) to be confirmed onto the operating room schedule up to three …
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Application of unified constitutive relations to hybrid stress finite element formulation
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
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Implicit coupled constitutive relations and an energy-based method for material modelling
… are an implicit modelling method for the coupled constitutive relations and an energy-based method for material modelling. The two developed methods utilise implicit models to represent material constitutive relations without the requirement of physical parameters. The first method is developed to …
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Flow Criteria and Constitutive Relations for the Numerical Analysis of Plane Stress Problems With Creep
Made available in DSpace on 2014-12-10T17:25:53Z (GMT). No. of bitstreams: 1 7013444.pdf: 2583641 bytes, checksum: 82e62663141c735fc212d3419a2e2c91 (MD5) Previous issue date: 1969
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Direct Assessment and Investigation of Nonlinear and Nonlocal Turbulent Constitutive Relations in Three-Dimensional Boundary Layer Flow
… of model assumptions underpinning turbulent constitutive relations, which are fundamental building blocks of every turbulence model. Specifically, the study focuses on the relevance and necessity of nonlinear and nonlocal model assumptions for accurately predicting 3D TBLs. The study …
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Constitutive Relations Among Conflict, Power, and Change in Complex Organizations: An Ethnographic Study of a Government Research and Development Laboratory
… mail. Analysis of the data involved looking for relationships between and among conflict, power, and change. Three key aspects of conflict emerged from the analysis of these relationships. First, conflict and power were found to be mutually constitutive. Conflict was an occasion for members to …
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Nonlinear deflections of a circular plate with varying thickness
… symmetric thin plate are used with the Alexander constitutive relations for a rubber-like material to analyze the deflections, stress resultants and change in the thickness for a plate clamped along the outer edge and deflected by a uniform pressure applied normal to the deformed surface. The …
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Analysis of metal matrix composite structures using a micromechanical constitutive theory
… structures is examined using a micromechanical constitutive theory. Effective lamina and laminate constitutive relations based on the Aboudi micromechanics theory are presented. The inelastic matrix behavior is modeled by the unified viscoplasticity theory of Bodner and Partom. The laminate …
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Development of the Finite Difference Time Domain Method on a Lebedev Grid for Anisotropic Materials
… the standard Yee grid, to better represent the constitutive relations in anisotropic materials. The Lebedev grid extends the Yee grid by approximating Maxwell's equations with tensor constitutive relations using only central differences. A dispersion relation with stability criteria is derived …
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A viscous-viscoelastic creep model
… of combined tension and torsion, nonlinear constitutive relations were developed and predictions by the theory were compared with the creep data. In the viscous-viscoelastic creep model the total strain was separated into four strain components: elastic, time-independent plastic, …
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Validation of a multiphase CFD model with mass transfer for xenon removal in molten salt reactor
… about the Eulerian-Eulerian two-fluid model and constitutive relations are presented. The detailed procedures and results of the three validation experiments are reported. Different phase interaction mechanisms, material properties, and constitutive relations are compared with each other and with …
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Particle Diffusivity in Fully Developed Turbulent Pipe Flow of Dilute Suspensions
… is essential in the formulation of the constitutive relations needed for the solution of conservation equations governing multiphase flow. Particle diffusivity is also a key parameter in the modeling and scaling of systems involving multiphase flow. The present investigation is concerned …
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Geometric electroelasticity
… a curved space. Moreover, we formulate so-called constitutive relations that encode the properties of the used material. Balance of energy as a scalar law can easily be formulated on a Riemannian manifold. The remaining balance laws are then obtained by demanding that balance of energy is …
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Análise dinâmica não linear da interação solo-estrutura em plataformas marítimas
… model also enhances the utilization of complete constitutive relations for soil. Several applications in structural dynamics and wave propagation problems were studied. They were solved by an implicit incremental-iterative formulation for the nonlinear movement equations. Finally, some …
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Experiments on powder metals
… aimed at the development of elastic-plastic constitutive relations for cold compaction of ANCOR MH-100 iron powder. A systematic experimental program consisting of triaxial compression, torsion ring shear, uniaxial strain compression, and simple compression test systems has been conducted to …
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Numerical Simulation of Reinforced Concrete Subjected to Multiaxial Stress Conditions
… is cast on: (1) three dimensional nonlinear constitutive relations and failure criterion for concrete subjected to short term monotonic loading; (2) crack modeling in concrete; (3) interface stress and stiffness transfer across the crack; and (4) finite element implementation of the findings …
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Physically based multiscale-viscoplastic model for metals and steel alloys: theory and computation
… various primarily metal forming, is to develop constitutive relations which are widely applicable and capable of accounting for complex paths of deformation. Achieving such desirable goals for material like metals and steel alloys involves a comprehensive study of their microstructures and …
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Adaptation of granular solid hydrodynamics for modeling sand behavior
The development of constitutive models that can realistically represent the effective stress-strain-strength of the soil properties is essential for making accurate predictions using finite element analysis. Currently, most of the existing constitutive models are based on the framework of …
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Direct and inverse electromagnetic scattering problems for bi-anisotropic periodic media
… of the spatial variable and make up two constitutive relations in addition to the Maxwell’s equations. In the equations, the incident fields which we send towards the object are known. For the direct problem, we also know the three quantities characterizing the object, and the goal is to …
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