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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 25 for “"Elastic solid"”.
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Wave-induced pore-pressure and stresses in a poro-elastic solid
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1982.
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Simulation of micro-shaped charge experiments and analysis of shock states for a hyper-elastic solid
… It also advances on shock states for a hyper-elastic solid using the Blatz-Ko equilibrium relations and general conservation laws. Basic Rankine-Hugoniot relations for longitudinal isotropic motion are determined. To further this topic, a study of anisotropic materials was conducted using …
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Superfícies singulares e ondas de aceleração em misturas
… of propagation for a mixture of a rigid solid and a non viscous fluid and a mixture of an elastic solid and a non viscous fluid.
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Two Studies in Evanescent Wave Propagation (Beam, Acoustic, Gaussian)
… growth of a tensile crack in the unbounded elastic solid are reviewed. These approximations are then Fourier transformed to give the high-frequency portion of their spectra. Second, time- and frequency-domain approximations to the surface motions excited by this growing crack, when it is …
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Analysis and development of a monolithic computational approach for fluid–structure interaction by means of the finite element method
… an incompressible, viscous fluid and a linear elastic solid. The domain movement is considered by utilizing the arbitrary Lagrangean–Eulerian viewpoint for the fluid equations. Within a monolithic computational approach the fluid and structure equations are solved numerically in the reference …
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Coupled Elastic-Plastic Thermomechanically Assisted Diffusion: Theory Development, Numerical Implementation, and Application
… transport of dilute mobile constituents in an elastic solid is extended to include the effects of elastic-plastic deformation. Using the principles of modern continuum mechanics and classical plasticity theory, balance laws and constitutive equations are derived for a continuum composed of an …
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Wave propagation in finite element and mass-spring-dashpot lattice models
… is evaluated in each model of an isotropic elastic solid. With regard to phase speed, materials with constant N grid spaces per P-wavelength having Poisson's ratios between 0.0 and 0.25 are modeled more accurately with the MSLM. Materials with Poisson's ratios between 0.35 and 0.5 and N grid …
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Fundações de máquinas rotativas sobre estacas
… machine foundations resting on a semi-infinite elastic solid, proposed by Rausch (1943), and a theory by us proposed sufficiently exact within the actual "state-of-the-art" of machine foundations based on the theory of Matrix Structural Analysis. We have also studied how to obtain unbalanced …
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Wave propagation in finite element and mass-spring-dashpot lattice models
… is evaluated in each model of an isotropic elastic solid. With regard to phase speed, materials with constant N grid spaces per P-wavelength having Poisson's ratios between 0.0 and 0.25 are modeled more accurately with the MSLM. Materials with Poisson's ratios between 0.35 and 0.5 and N grid …
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A general solution for the thermal stresses and strains in an infinite, hollow, case-bonded rocket grain
… and strains in a hollow cylindrical case-bonded solid propellant. The heat conduction equation, as solved by Carslaw and Jaeger, was applied to a hollow composite cylinder. The temperature distribution from this equation was used in conjunction with the stress and strain for an elastic solid …
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The elastic stress field produced by a point force in a cubic crystal
… by a point force at the origin in an infinite elastic solid. Eshe1by in 1955 gave an approximate solution of the dilatation for the triple force at the origin wi th no moment. Eshe1by and Leibried gave expressions which converge only when [equation] The present calculation uses Fredholm's work …
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Characterization of the Morphology, Composition, and Activity of the Germ Plasm in Nasonia vitripennis
… nuclear cycles suggest they exhibit the liquid/elastic solid-like behaviors of deformation, fragmentation, relaxation, and membrane wetting. Using a fluorescence assay to detect ribosome association and by measuring mean mRNA intensity, I also provide initial evidence for the occurrence of both …
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Homogenization of heterogeneous Cauchy-elastic materials leads to Mindlin second-gradient elasticity
… the non-local parameters of a second gradient elastic ma- terial and the microstructure of a composite material. This result is instru- mental for the definition of higher-order models, to be used for the analysis of mechanics at micro- and nano-scale, where size-effects become important. The …
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ΓΕΝΙΚΕΥΜΕΝΑ ΚΡΙΤΗΡΙΑ ΑΣΤΟΧΙΑΣ ΑΡΧΙΚΩΣ ΑΝΙΣΟΤΡΟΠΩΝ ΕΛΑΣΤΙΚΩΝ ΜΕΣΩΝ ΜΕ ΙΔΙΑΙΤΕΡΗ ΕΜΦΑΣΗ ΣΤΑ ΣΥΝΘΕΤΑ ΥΛΙΚΑ
THE "ELASTIC STRUCTURE" OF LINEARLY ELASTIC ANISOTROPIC MEDIA WAS STUDIED IN TERMS OF SPECTRAL ANALYSIS THEORY OF 4TH RANK SYMMETRIC TENSORS. BY MEANS OF THE SPECTRAL DECOMPOSITION OF THE TRANSVERSELY ISOTROPIC COMPLIANCE TENSOR, ITS EIGENVALUES AND EIGENTENSORS WERE EXPLICITY DEFINED. IT WAS SHOWN …
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Theoretical studies of smectic liquid crystals in the presence of flow, oscillatory perturbations, and edge dislocations
… at a planar boundary between an isotropic elastic solid and a smectic A liquid crystal. The behaviour of the wave upon reflection and refraction at the interface is established, as is the response of the smectic; a comparison with the smectic C case as considered by Gill and Leslie …
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A Technique for Solving the Singular Integral Equations of Potential Theory
… displacement of penny shaped cracks in an elastic solid under various loading conditions. Conformal mapping techniques for solving problems on non-circular domains are also briefly discussed as are extensions to fields that are governed by the Helmholtz Equation.</p>
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Bacteria At Oil-Water Interfaces
… motile bacteria. Thereafter, it becomes viscoelastic as polysaccharides, surfactants, and bacteria accumulate, with hallmarks of soft glassy interfacial rheology. Finally, the interface is covered with a thin elastic solid film. On pendant drops covered with such films, the film wrinkles upon …
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Moisture Content Determination and Temperature Profile Modeling of Flexible Pavement Structures
… and raveling. In addition, as HMA is a viscoelastic material, it behaves more as a viscous fluid at high temperatures and as an elastic solid at low temperatures. Between these two temperature extremes, a combination of these properties is evident. Thus, understanding the environmental …
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Statistical mechanics of the amorphous solid state of randomly crosslinked macromolecules
… a liquid), together with sulfur, he obtained an elastic solid material. This liquid-solid transformation was later found to entail the random crosslinking of the linear macromolecules forming natural rubber, until the crosslink density is high enough that an equilibrium phase transition--the …
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