Global ETD Search
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 12 of 12 for “"elastic instability"”.
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The elastic instability of duralumin columns in compression
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautical Engineering, 1933.
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Experimental and theoretical studies of elastic instability in growing yeast colonies and thin sheets
The thesis gives a comprehensive study of elastic instability in growing yeast colonies and thin sheets. The differential adhesion between cells is believed to be the major driving force behind the formation of tissues. The idea is that an aggregate of cells minimizes the overall adhesive energy …
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At the Intersection of Bistability and Elastic Instability: Switching and Locking Structures using Asymmetric Carbon Fiber Composites
The next evolution of engineered structures would be to have an on-demand ability to become soft and foldable for packing in compact dimensions. This adaptive capability makes them convenient in transportation such as space structures where packaging of large deployable structures is crucial that …
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Multiscale phase-field approach to martensitic phase transformations that satisfies lattice instability conditions
… at nanoscale that satisfies crystal lattice instability conditions obtained by atomistic simulations. Theory includes a fully geometrically nonlinear formulation for the general case of finite elastic and transformational strains as well as anisotropic and different elastic properties of …
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Shape formation via elastic instabilities
… load is reached, the object will undergo an elastic instability and adopt a dramatically different and more complicated shape. Traditionally, elastic instabilities, such as buckling and wrinkling, have been studied as failure modes in stiff material systems. However, soft highly deformable …
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Static and Dynamic Response of Elastic Skeletal Structures using an Enhanced Beam Element
… program has been developed.<br/><br/>Linear elastic instability of slender beams is also investigated. The buckling loads associated with this type of analysis are computed in the same manner as for the natural frequencies. The use of the new element is extended to a space frame with …
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Three-dimensional polymeric capillary network: fabrication and applications
… the transient response speed, we introduced the elastic instability into our beam design. Combined with a design criteria analysis based on beam bending theory, we proved in our experiment the existence of a critical value for a dimensionless parameter that determined the buckle of a curved beam.
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Stability analysis of edge corrugated shells
… shells involve buckling and sudden snap-through instability, which designers commonly address by adopting simplified methods, based on the use of empirical knock-down factors. This research stems from an original building in Rome, the Palazzetto Flaminio dome, designed by A. Vitellozzi and P. L. …
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Geometrically nonlinear finite element analysis of a glulam timber dome
… of the structure up to failure. It is shown that elastic instability, which is governed by geometric nonlinearities, is the dominant failure mode of the test dome. At the critical load, the induced element stresses remained below the proportional limit of the material. A discussion of the results …
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Three-dimensional micro fabrication of active micro devices using soft functional materials
Made available in DSpace on 2012-02-01T00:48:26Z (GMT). No. of bitstreams: 3 Lee_HoWon.pdf: 4405248 bytes, checksum: 41d914103a408ca170c48385421652fa (MD5) license.txt: 4054 bytes, checksum: 2175a1ca06310f92256240bfeceb9bbb (MD5) Lee_Ho Won.docx: 54614972 bytes, checksum: …
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Viscous Fingering Instability of Complex Fluids in a Radial Hele-Shaw Cell
… fluid of higher viscosity in a porous medium, instability can develop at the interface between the two fluids. The instability manifests itself in the form of finger-like patterns of the displacing fluid propagating through the displaced one. In this work, viscous fingering instabilities …
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Buckling Patterns and Mechanics of Thin Interfacial Polymer Films
<p>Thin elastic solids are easily deformed and will readily collapse into complex buckling modes. They can also transition between distinct buckling modes when the confining forces evolve over time, forming a variety of robust and striking patterns. Here we explore how thin interfacial films and …