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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 28 for “"Thin-shells"”.
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Localization of deformation in thin shells under indentation
… study of the localization of deformation in thin spherical elastic shells under indentation. Past a critical indentation, the deformation of the shell ceases to be axisymmetric and sharp points of localized curvature form. In plates, these sharp points are known as d-cones. By way of analogy, …
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Pure bending of thin shells of revolution: a nonlinear dislocation problem.
Massachusetts Institute of Technology. Dept. of Mathematics. Thesis. 1966. Ph.D.
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Finite-difference calculation method for large elastic-plastic dynamically-induced deformations of general thin shells.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 1967
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A finite element program for the static analysis of branched, thin shells of revolution under axisymmetric loading
… static analysis of variable thickness, branched, thin shells of revolution, composed of straight sections and subject to general, axisymmetric mechanical, 1,oading. The thin she1,1, theory and finite element theory forming the basis of the analysis are described, with particular attention being …
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Asymptotic analysis of vibrations of thin cylindrical shells
… boundary value problems involving vibrations of thin cylindrical shells by means of symbolic computation is presented. The algorithm is based on the method of asymptotic integration of the vibration equations of thin shells, developed by Goldenveizer, Lidsky and Tovstik. A linear shell theory of …
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Elastoplastic buckling of doubly curved unstiffened shells
… of reliable values for the buckling pressure of thin shells has become very Important in recent years. The increased necessity and usage of lighter weight components in missile propulsion systems has required more precise calculations to avoid stability problems and to increase economic …
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Um modelo simples para a representação do comportamento não-linear de estruturas de superfície
… large deflection behaviour of elastic-plastic shells is given and numerical solutions are obtained using the finite element method. A modification is used for von Mises’s approximate yield criterion for thin shells. This modification includes the strain hardening effects and makes the yield …
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Análise dinâmica linear de cascas axissimétricas com um elemento finito curvo
… of LOVE and FLÜGGE is presented for axisymmetric thin shells under the action of arbitrary loads including temperature effects. The general equilibrium equations and the corresponding boundary conditions are obtained from the Principle of Virtual work. To determine the aproximate solution one …
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Análise dinâmica linear por superposição modal de cascas finas arbitrárias pelo Método dos Elementos Finitos
… study the linear dynamic behavior of arbitrary thin shells by the Finite Element Method. Plane triangular elements with eighteen degrees of freedom each are used. The general equations of movement are obtained from the Hamilton Principle and solved by the Modal Superposition Method. The presence …
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Computer aided analyses of symmetrically loaded thin cylindrical shell using transfer matrix method
Thin shells as a structural form have made important contribution to the development of several branches of engineering, e.g., chemical, power, structural engineering, etc. The aim of this research is to analyze symmetrically loaded thin cylindrical shell structures using transfer matrix method. A …
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Modeling and Simulation of Morphological Instabilities in Thin Elastic Solids
<p>The study of morphological instabilities in thin solids, such as buckling of thin shells and wrinkling of thin sheets, is of growing interest to a number of academic disciplines including en-gineering, physics, biology, and many others. For example, buckling has traditionally been re-garded as …
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Role of the Curved Parametric Element in Linear Analysis of Thin Rotational Shells.
… element applied to axisymmetric oscillations of thin shells of revolution.<br/><br/>The current scheme was confined to applying the above curved parametric element to the axisymmetric static case and was then developed to static analysis with any harmonic variation of loading.<br/><br/>The …
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Finite Element Analysis of a Pair of Leaning Pressurized Arch-Shells Under Snow and Wind Loads
… other at the apex is considered. The arches are thin shells with internal pressure. This type of structure with solid arches has been used in bridges, such as the Gateway Arch Bridge in Columbus, Indiana, U.S.A., the Monongahela River Bridge in Pittsburgh, Pennsylvania, U.S.A., and a pedestrian …
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Multilevel, subdivision-based, thin shell finite elements: development and an application to red blood cell modeling
… numerical simulation of the deformation of thin walled structures. We address the need to characterize and improve the performance of the subdivision thin shell finite element for practical applications in engineering design and analysis. The contribution of this document is to provide a …
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A study of a dynamical finite element analysis for application to axial wave propagation problems in semi-infinite and finite membranes and shells of revolution
… propagation problems occurring in membranes and thin shells of revolution. Both semi-infinite and finite versions of cylindrical and conical membrane shells are studied and a finite membrane shell having a meridional curve which is parabolic is solved. A thin cylindrical shell is also considered …
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Shell finite elements, with applications in biomechanics
… a detailed presentation of a formulation for thin shells, and its finite element approximation, with the goal of modelling soft, thin biological tissues. The rigorous but complex theory due to Simo and Fox (1986) is presented in an accessible manner, with detailed derivations where …
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In-fiber semiconductor filament arrays
… to understand the stability (or instability) of thin shells and filaments, we explore a physical mechanism during the complicated thermal drawing. A perspective of capillary instability from fluid mechanics is focused. Axial stability of continuous filaments is consistent with capillary …
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The Influence of Curvature on Mantle Convection featuring a Temperature-dependent Viscosity
… with relatively small cores and relatively thin shells. Differences in mean temperature and flow fields observed between 2D and 3D geometry are amplified as relative core-size is decreased. This finding has implications for modelling the thermal evolution and evaluating heat extraction from …
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Paths Towards Shape Change: Elastic Instabilities and Spontaneous Deformations
… how curvature loads govern the instabilities in thin shells.
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Variational Inference and Probabilistic Models for Parametric Partial Differential Equations
… and nonlinear Poisson, nonlinear heat diffusion, thin-shells, wave, Burgers, and incompressible Navier-Stokes equations.
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