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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 81 for “"Shell structures"”.
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Multistable Shell Structures
Multistable structures, which possess by definition more than one stable equilibrium configuration, are capable of adapting their shape to changing loading or environmental conditions and can further improve multi-purpose ultra-lightweight designs. Whilst multiple methods to create bistable shells …
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Behavior of shell structures
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1999.
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Analysis of Thick-Shell Structures
Made available in DSpace on 2014-12-10T23:36:44Z (GMT). No. of bitstreams: 1 7317189.pdf: 2626587 bytes, checksum: 91c7c257062417cb800d250039858cb6 (MD5) Previous issue date: 1972
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Geometry of Creased Shell Structures
Thin Shells are widely used structural elements but are often limited to simple geometries. Special geometric designs can optimise performance through light yet stiffer shell structures. Creasing is one such method that has attracted a lot of traction lately. Many of these structures are …
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Multistable and morphing corrugated shell structures
'Compliant' structures, i. e., structures that undergo large deformations as part of their normal behaviour, can perform the function of a complex mechanism with just a single, or very few, components. When multistability is introduced into compliant structures, an even greater simplification can …
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Analysis of Elasto-Plastic Shell Structures
Made available in DSpace on 2014-12-08T23:56:59Z (GMT). No. of bitstreams: 1 6808221.pdf: 3255758 bytes, checksum: f131ea1a6e3dde54b2ad3b3b0a53cb5d (MD5) Previous issue date: 1967
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Investigation of shell and axisymmetric shell structures
… R. L1., Stress matrix for a doubly curved shell finite element, C. E. G. B. pub. No. RD/L/N 113/76 4. Nelson, R. L1., A new algorithm to program the element matrices of doubly curved shell finite elements, C. E. G. B. pub. No. RD/L/N 139/77 5. Nelson, R. Ll., Free vibration analysis of …
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Free form finding of grid shell structures
The general shape of a shell structure can have a great impact on its structural performance. This thesis presents a numerical implementation that finds the funicular form of grid shell structures. Two methods are implemented for the form finding: the potential energy method (PEM) and the force …
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Past and future of grid shell structures
… free space that they provide, the design of grid shell structures challenges architects and structural engineers in more than one way. Very few grid shell building exist around the world. This scarcity may be explained by the level of innovation required in such fields as design technique; …
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Optimally stiffened thin shell structures in 3D printing.
Thin shell structures have been widely applied in crafts, art, industry, architecture, aerospace, etc. The dilemma in printing thin shell structures is the balance between material efficiency and structural soundness. The use of more material will produce a more solid and sound structure but it …
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Parametric study of stiffened steel containment shell structures
… stiffened steel cylindrical and conical shell frustum subjected to different load cases. This situation arises in different steel shell applications such as storage vessels (liquid, solid and gas) and in certain configurations of industrial process facilities. The stiffeners are flat …
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On triangular finite elements for general shell structures
… are most efficient to discretize arbitrary shell geometries. However, in shell finite element analysis, usually quadrilateral elements are used due to their better performance. Indeed, there does not exist yet a "uniformly optimal" triangular shell element. The work in this thesis focuses on …
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On nonlinear finite element analysis of shell structures
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1984.
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Large Strain Finite Element Analysis of Spinodal Shell Structures
… element analysis was used to model spinodal shell structures, allowing the study of the architecture properties and inspection into the interior of the structure to allow a better understanding of the nanomaterial behavior. Isotropic, lamellar, columnar, gradient, and bioinspired conch …
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Synthesis and Characterization of Protein-Polymer Core-Shell Structures
… all BNPs-based materials, BNPs-polymer core-shell structures with the polymer as the core and BNPs as the shell can find poteinal applications such as drug delivery and cell binding. However, no methods to form the BNPs-polymer core-shell structures have been reported.</p><p>In chapter one, …
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On the free vibration behavior of cylindrical shell structures
Shell structures, especially cylindrical shells, are widely used in aerospace and naval architectural industries. Submarine hulls and aircraft bodies can be idealized as cylindrical shell structures. The study of vibrations of cylindrical shells is an important aspect in the successful applications …
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Towards optimal mixed finite elements for general shell structures
… bending problems. However, no existing general shell elements have been shown to satisfy the mathematical conditions of optimality in the analysis of shell structures. The objective in this thesis is to work towards optimal shell elements that possess properties of uniform convergence …
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On finite element nonlinear analysis of general shell structures.
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1979.
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Modeling of the induced strain actuation of shell structures
… piezoelectric actuator patches bonded on structures are used for active shape, vibration, and acoustic control, the desired deformation field in the structure is obtained through the application of localized line forces and moments generated by expanding or contracting bonded piezoelectric …
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Simulation of deformation and fracture in very large shell structures
… in the practical design of very large thin structures such as aircraft fuselages, ship hulls, automobiles, submarines, and pressure vessels. In many applications, fracture is a critical design concern, and thus the ability to numerically predict crack propagation in shells is a highly …
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