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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 1176 for “"Sheets"”.
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Viscous fluid sheets
… general theory for the dynamics of thin viscous sheets. Employing concepts from differential geometry and tensor calculus we derive the governing equations in terms of a coordinate system that moves with the film. Special attention is given to incorporating inertia and the curvature forces that …
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Sticker controller and sticker programming for smart sheets (self-folding sheets)
This thesis describes a self-folding sheet that is capable of origami-style autonomous folding. We describe the hardware device we designed and fabricated. This device, called a self-folding sheet, is a sheet with a box-pleat pattern and an integrated electronic substrate and actuators. The sheet …
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Fracture prediction in metal sheets
One of the most important failure modes of thin-walled structures is fracture. Fracture is predominantly tensile in nature and, in most part, is operated by the physical mechanisms of void nucleation, growth, and linkage. For ductile sheet, fracture is preceded by necking. Prediction of necking …
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Collective migration of epithelial sheets
… the basic origin of the collective motion of sheets has eluded a clear and quantitative interpretation in physical terms, prohibited by the lack of understanding of the relationship between motility, cell-cell contact, and their mediation by the mechanical properties of the substratum to which …
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Processing Extrudable Sheets using Decoloured Bloodmeal
… blends was assessed, and the properties of the sheets produced were measured. The effects of different processing methods and different processing steps on the produced sheets were investigated in terms of mechanical, structural and water absorption properties. With a fundamental understanding …
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Blast wave attenuation using liquid sheets
… cases, both between and external to the liquid sheets. The experimental investigation also included field trials that examined the pressure profiles of blast waves that were produced when a shock wave, which resulted from the ignition of a rocket motor, was passed along a liquid tube. From this …
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Water flow beneath past ice sheets
The movement of water beneath ice sheets exerts an important, yet poorly understood, control on how ice masses respond to climatic warming. However, the subglacial realm of ice sheets is one of the most inaccessible environments on Earth. Consequently, little is known about the processes that …
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Wrinkling and sagging of viscous sheets
… and sagging behavior of thin viscous Newtonian sheets and filaments motivated by analogous scenarios in elasticity. These problems involve dynamic free boundaries and geometric nonlinearities but use simple physics. The first problem examined concerns an annular viscous sheet subjected to …
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Statistical Mechanics of thermalized ribbons and sheets
… we study the thermal behavior of two-dimensional sheets and ribbons. We study the effects of thermal fluctuations on the crumpling transition of elastic sheets. Existing two-dimensional sheets have a crumpling temperature which is very high and the crumpling transition has not been observed …
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Hydrogen storage in pt/carbon nanotube sheets
… types of self-assembled carbon nanotube (CNT) sheets, for example, carboxylic functionalized multi-walled CNTs (MWNTs-COOH), pure multi-walled CNTs (MWNTs), and pure single-walled CNTs (SWNTs), were prepared as substrates by ambient environment vacuum filtration of suspensions of the nanotubes. …
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Radio-echo layering in polar ice sheets
… observed in the Antarctic and Greenland ice sheets during radio-echo sounding. It describes in detail layering seen with 60 and 300 MHz equipment _in the Antarctic ice sheet during three field seasons betwe~n 1974 and 1979, and discusses the effects of glaciological and equipment factors, …
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A Mechanics Analysis of Coupled Tube Sheets
Made available in DSpace on 2014-12-04T23:11:09Z (GMT). No. of bitstreams: 1 6400548.pdf: 3920742 bytes, checksum: 33a2ec09c808a17da43251b10f8b11d9 (MD5) Previous issue date: 1963
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Reduced modelling of mountains and ice sheets
… make up mountains and of ice in glaciers and ice sheets can often be treated as a fluid flow. These geophysical systems are, however, very complex in terms of the rheology of their constituents and their interactions with environment. Simple mathematical models are often very helpful to reduce the …
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Vorticity and vortex sheets in axial turbomachines
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Mechanical Engineering, 1954.
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Two cylindrical vortex sheets : evolution and singularity formation
… counter-rotating, initially cylindrical vortex sheets in an incompressible, potential fluid flow is studied. Simulations are performed in time up to the occurrence of branch-point curvature singularities in the vortex sheets' geometries. The numerical methods employed are discussed. Parameters …
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PHOTO-GUIDED SHAPE TRANSFORMATION OF COMPOSITE HYDROGEL SHEETS
Shape-changing hydrogel material has numerous potential applications in biomimetics, soft robotics, biomedicine, etc. Light as a clean energy source can be remotely delivered to material with high spatial and temporal resolution, which brings new controllability to shape-transformation of hydrogel …
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Mechanisms of emplacement of cone sheets, Ardnamurchan, Argyll
Thin (1m), centrally inclined (cone) sheets of basic rock are a unique but common feature of the intrusive complexes within the Thulean Igneous Province. A field, structural, statistical and petrographic analysis of these sheets belonging to the Ardnamurchan Central Intrusive Complex has been made …
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Elastocapillarity: adhesion and large deformations of thin sheets
… the deformation and adhesion of thin elastic sheets that come into contact with an underlying substrate. The focus of this work is on the interplay between material and geometric properties of a system and how this interplay determines the equilibrium states of sheet and substrate, …
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Compressive strength of stiffened sheets of aluminum alloy
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Aeronautical Engineering, 1930.
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