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 20 of 35 for “"Varying Thickness"”.
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Nonlinear deflections of a circular plate with varying thickness
… and large strains in a circular plate with varying thickness and a circular membrane is considered. The exact tensor first approximation equilibrium equations, converted into physical equations for a rotationally symmetric thin plate are used with the Alexander constitutive relations for a …
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Mathematical development of and tests on propeller sections of varying thickness
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautical Engineering, 1916.
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Spot Friction Welding of Ultra High-Strength Automotive Sheet Steel
… DP780, DP780EG, DP980, and DF140T sheet steel of varying thickness from 1.2 mm to 1.4 mm. Welding was accomplished using a PCBN standard tool. Weld strengths were then compared to a proposed AWS standard. Initial hardness readings were taken in cross sectioned samples. Grain structure in a SFW is …
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Printing protein-engineered paper for biosensors
… microfluidic biosensors with customised and varying paper properties. A novel printing method based on the localised vacuum-driven filtration of fibre suspensions (‘vacuum-driven printing’) was explored for the direct formation and patterning of engineered paper. An analytical model based on …
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A Study of Durability for Elastomeric Fuel Cell Seals and an Examination of Confinement Effects in Elastomeric Joints
… have been evaluated for a bonded joint with varying thickness along the bonded direction. The Dreaming project is a glass art project in Fredrick, MD which incorporates such a varying thickness joint where thermal expansion of the adhesive has caused the glass adherend to break and debonding …
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Deformations of the pneumatic tyre
… of a triangle of double curvature with varying thickness. Large deflections of' the structure are accomodated by the use of an iterative sequence of small incremental steps, each of' which obeys the laws of linear mechanics. The theoretical results are found to compare favourably with …
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A nondimensional model for axial digging in granular materials
… Experiments were conducted by pushing diggers of varying thickness into the granular packing and recording the force-depth data. The digger is modeled as a column in buckling; its column effective length factor is calculated. We solve two optimization problems. First, we limit the axial force the …
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Development, modeling, testing and evaluation of vibration attenuating gloves
… Several, simple rectangular air bladders of varying thickness were developed and tested for their vibration attenuating characteristics. A four degree-of-freedom, lumped-parameter model of the vibration response of the human hand and bladder was developed using measured hand and bladder …
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Observations from working with a simple mathematical model of light absorption by small particles in the ocean
… chlorophyll a, pure water absorption data, and thickness of water layer as inputs, and outputs the attenuation by absorption of light that shines through a layer of water containing suspended, absorbing cells. Plots of absorptive attenuation were made, varying thickness, cell diameter, and …
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A multiplier phototube thickness indicator
The multiplier phototube thickness indicator developed in this research detects the varying thickness of the carbon ink coating on a moving web of paper. The absolute effect of the density variations of any of the particular types of tissue tested on those measurements has not been fully determined …
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The fundamental complex of Western Damaraland, South West Africa
… on which all younger rocks repose as a veneer of varying thickness and continuity are everywhere generally grouped together under the term Basement or Fundamental Complex. For obvious reasons, chief of which are their invariably highly folded and metamorphosed nature and the entire absence of …
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A Study of Symmetry Breaking and Stability in Conical Shells and the Implications for Actuators
… of spherically capped conical shells of varying thickness, cone angle, and slant height. The main finding of the FEM studies is that the capped shells suddenly buckle during the indentation as the ridge approaches the region where the cap and conical shell meet. The geometry of this join …
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Experimental investigation of tearing fracture in sheets under quasi-static loading
… was then used to test thin steel sheets of varying thickness (0.419 and 0.724mm) in order to validate the quasi-static method of recreating the petalling phase through a comparison with analytically derived results.
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Self-healing properties of water filtration membranes containing amphiphilic comb polymer
… sessions using concentrated acid. Membranes of varying thickness are shown to exhibit PEO-regenerative abilities, but it appears that thick membranes have better fouling recovery than thinner, filtration-series membranes. Also, it is found that a blend membrane stripped of all of its surface PEO …
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Quaternary Silver Bismuth Chalcogenide Halides Ag - Bi - Q - X (Q = S, Se; X = Cl, Br): Syntheses and Crystal Structures
… type denoted B represents NaCl-type fragments of varying thickness. It is defined by the number N of octahedra within the chain of edge-sharing octahedra running diagonally across it in the (010) plane of the structure. The thickness of module B for current members of the series extends from N = 0 …
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Fibre Orientation and Breakage in Glass Fibre Reinforced Polymer Composite Systems: Experimental Validation of Models for Injection Mouldings. Validation of Short and Long Fibre Prediction Models within Autodesk Simulation Moldflow Insight 2014
… centre gated mouldings have been assessed with varying thickness and sprue geometries for the centre gate. Alternative image analysis techniques are used to measure the orientation and length of injection moulded short and long fibres composite components. The fibre orientation distribution …
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Thermal Analysis and Cation Doping of Nafion Membranes
… diffusion, and decomposition. Membranes of varying thickness in acid and sodium</p> <p>form have been tested in vapor sorption and FTIR for comparison.</p>
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Investigating the operating mechanism of a diffraction based biosensor
… the first was to develop a series of gratings of varying thickness using polyelectrolyte multilayers. The indices of refraction of these gratings were adjusted by the incorporation of charged gold nanoparticles. Since DBS systems operate by monitoring the binding of analyte molecules, a second …
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Pyrochlore spin ice Dy2Ti2O7: Investigating a platform for magnetic monopolar quasiparticles
… environments, and of Dy2Ti2O7 thin films of varying thickness in a pulsed laser deposition system. After determining spin ice quality, a supeconducting quantum interference device (""SQUID"")-based magnetometer in a dilution refrigerator was used to search for signatures of monopole …
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Mechanical and geological controls on the long-term evolution of normal faults
… between normal faults in a lithosphere of varying thickness. I suggest that large along-axis gradients in lithospheric thickness can prevent the growth of continuous faults along-axis, and instead decouple the modes of faulting at the segment center and at the segment end.
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