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Showing 1 to 20 of 38 for “"elasticity theory"”.
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The determination of soil parameters for design from stress path tests
… design of the apparatus and test procedure. Elasticity theory for cross-anisotropic soils is reviewed, particularly as it relates to the triaxial apparatus.The way in which elasticity theory is incorporated in the critical state model is discussed. Isotropic compression a~ swelling test the …
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I. Resonant two-proton reabsorption by exition-polaritons in cuprous chloride films ; II. Heat pulse progration across metal/sapphire interfaces ; III. Phonon focusing in piezoelectric crystals
… at large momertum is produced and a simplified theory of the resonant resonant reabsorption process is described. 2.Heat pulse propagation across metal/sapphire interfaces. The angular dependerce of ballistic phonon propagatior ir sapphire is found to exhibit three distinct types of features. …
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Three-Dimensional Non-Axisymmetric Anisotropic Stress Concentrations
… first and second boundary value problems of elasticity theory for a spheroidal cavity embedded in a transversely isotropic medium are presented. The analysis is based upon solutions of the homogeneous displacement equations of equilibrium in terms of three quasi-harmonic potential functions, …
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Acoustic mode quantization in nanostructures
… from those of the corresponding bulk. Based on elasticity theory, the eigenfrequencies of these modes have been calculated and they agree well with the experimental data. Furthermore, by fitting the calculated mode frequencies to the experimental ones, the elastic properties of these …
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Análise de estaqueamento pelo método das cargas limite
… on safety factors and piling design using the elasticity theory. We analyse thereafter the possible types of pile failure and develop studies which allow us to apply the elastic-plastic method to piling design. We may obtain then a redistribution of the load of the most highly loaded piles to …
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Investigation of Krypton bubbles in copper using x-ray techniques
… as predicted by the continuum ansatz of the elasticity theory. The pressure of the krypton bubbles manifests itself as a shear strain in the copper matrix and the shear strain is found to be below the yield strength of the copper matrix, thus explaining the long-term stability.
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Development, model validation, and preliminary experimental verification of an FEA program for structural analysis of casing in casing for oil wells.
… Analysis (FEA) program based on classical elasticity theory is developed to analyze a 2D and 3D model of this pipe-in-pipe configuration. The program is compared to commercial software for verification of the mathematical application. A Monte Carlo setup is applied on top of the program to …
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Development, model validation, and preliminary experimental verification of an FEA program for structural analysis of casing in casing for oil wells.
… Analysis (FEA) program based on classical elasticity theory is developed to analyze a 2D and 3D model of this pipe-in-pipe configuration. The program is compared to commercial software for verification of the mathematical application. A Monte Carlo setup is applied on top of the program to …
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Analysis of the Buckling States of an Infinite Plate Conducting Current
… complex problem in magneto-solid mechanics and elasticity theory and form a realistic model that sheds light on the bifurcation and buckling behavior resulting from the electromagnetic-field- induced self-forces that are derived in their full, exact form using Biot-Savart Law.
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Analysis of structural development during superdrawing of poly(ethylene terephthalate) fibers
… The model was based on the rubber elasticity theory and non-linear viscoelasticity.
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Linear analysis of laminated composite plates using a higher-order shear deformation theory
A higher-order shear deformation theory is used to analyze laminated anisotropic composite plates for deflections, stresses, natural frequencies, and buckling loads. The theory accounts for parabolic distribution of the transverse shear stresses, satisfies the stress-free boundary conditions on the …
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Moisture and stress effects on fretting between steel and polyimide coatings
… polymer and the metal substrate. Calculated from elasticity theory, the normal stress dropped shortly after the start of the test, remained relatively constant, and increased toward the end. This variation correlated with the wear rate and accounted for the non-linear increase of coating life with …
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Micropolar Continuum Modeling of Large Space Structures with Flexible Joints and Thermal Effects: Theory and Experiment
… found based on the assumptions of the micropolar elasticity theory. Necessary assumptions are made to reduce the order of the strain variables while retaining the effects of the micro-rotations that are coupled to the primary strain terms. As a result, a micropolar-based continuum model is found …
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Thermodynamics properties of crystals containing imperfections
Using thermodynamics and elasticity theory, a unified treatment of changes in the properties of crystals containing the major types of defects is given. Some previously derived results are recovered in the present calculations, such as the formula for volume changes of self-stressed media derived …
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Graphene under strain. A combined continuum-atomistic approach
By combining continuum elasticity theory and atomistic simulations, we provide a picture of the elastic behavior of graphene, which was addressed as a two-dimensional crystal membrane. Thus, the constitutive nonlinear stress-strain relations for graphene, as well as its hydrogenated conformers, …
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Multi-scale modelling of III-nitrides: from dislocations to the electronic structure
… present work is wide. It ranges from a continuum theory of dislocations treated within the linear elasticity theory, connects the continuum and atomistic level modelling for the case of the critical thickness of thin epitaxial layers, and covers some issues of simulating the electronic structure …
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Multiscale Modeling of the Deformation of Semi-Crystalline Polymers
… density. The second method utilizes rubber elasticity theory to quantitatively determine entanglement evolution. The results of the second method are used to gain a clearer understanding of the mechanisms involved to enhance the physical basis of the evolution equations in the continuum …
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Computer modelling of plastic deformation and fracture in heterogeneous systems.
… to recover the governing equations for continuum elasticity theory and is extended to include plasticity through the localised reduction of elastic moduli, and the application of internal forcces in order to maintain stress continuity. The properties of the bonds constituting the lattice are …
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Mechanical Property Characterization of Polymeric Composites Reinforced by Continuous Microfibers
… modeling software ANSYS. The formulae based on elasticity theory were derived for extracting the equivalent mechanical properties (Young’s moduli, shear moduli, and Poisson’s ratios) from the numerical solutions of the RVEs undergone these three load tests. Validation of the obtained microscale …
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Creep Behavior Of Thin Laminates Of Iron-Cobalt Alloys For Use In Switched Reluctance Motors And Generators
… power applications. Analytical work, utilizing elasticity theory, in conjunction with design requirements, indicates a need for magnetic materials to have strengths in excess of 80 ksi up to about 1000 degrees F. It is this combination of desired material characteristics that is the motivation …
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