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 32 for “"beam bending"”.
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Bridging Simple Models and Observations of the Flexure Zone around Antarctica
… Young’s modulus using a 1-D linear elastic beam bending model. The ice flexure zone is defined as the transition region between the grounded ice sheet and the free floating ice shelves, where the ice flexes due to the rise and fall of ocean tides. Surface elevation data from ICESat-2 were …
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A Microelectromechanical-Cantilever Hydrogen Sensor with Palladium-Driven Bending and Piezoresistive Readout
… the two key aspects of our fabrication, namely beam release and piezoresistor fabrication, shown beam bending driven by absorption of hydrogen by palladium, and shown that our piezoresistors respond to beam bending. Our physical results match our theoretical predictions for a beam of size 100 µm …
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Characterizing the mechanical properties of drop stitch inflatable structures
… drop stitch material was fabricated and simple beam bending tests were performed at different pressures. This data was then used to invalidate a developed model for the deflection of the sample. High standard deviations indicate that the pressure inside the tested sample was changing throughout …
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Counterbending in a flagellum macromodel
… Furthermore, it has been observed that under beam bending conditions a passive sperm flagellum will exhibit counterbend behavior which cannot be explained by current engineering theories. This study created a macroscopic model of the flagellum which allowed deeper exploration of these …
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A novel torsional spring design for knee prostheses and exoskeletons
… and an inner hub, which are connected by slender beams and store torsion energy in beam bending. The beams are fixed to the outer hub on one end and attached to the inner hub by a pin and slot on the other. The modeled spring design is capable of deflecting ± [pi]/6 radians, higher than any …
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Design and optimization of lightweight space telescope structures
… to an ideal deformation shape obtained from beam bending theory. Using these results, an optimum set of dimensions is found for the actuator standoff posts that minimizes the deviation of the finite element results from the ideal shape.
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Design of elastic metamaterials
… studies. A comparison showed that using frame bending/stretching mode is more effective than applying beam bending mode to broaden bandgap. Furthermore, it is found that adding internal resonant components could enlarge the bandgap. The single negativity metamaterials were validated by …
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Fabrication of chip-scale radio frequency inductors
… was accomplished by applying large-deflection beam bending to the case of planar wire deformation and through experimental validation. Generating this knowledge is important because it establishes fabrication limits for wire-based chip-scale inductors. There are many potentially viable methods …
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Development of an ion transport system for singly charged ion injection into an electron string ion source (ESIS) charge-breeder
… Ga+ and Au+ ions which are transported through a beam-line system consisting of charged particle optics such as focusing einzel-lenses, an electrical quadrupole switchyard for 90◦ beam bending, and subsequent correction and focusing lenses before the entry port into the ESIS. A replica of the full …
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An experimental study and finite analysis of punching shear failure in steel fibre-reinforced concrete ground -suspended floor slabs
… stiffening behaviour of SFRC based on a simple beam bending test and a statistical model developed in this research, this constitutive model was used later on in the modelling of the SFRC slabs using FEA. In the preliminary FEA, sufficient information for the size and the design of test …
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Magnetomicrometry : tissue length tracking via implanted magnetic beads
… scales, such as in monitoring tissues and cells, beam bending, fluid dynamics, human-computer interaction, and traffic. Due to these widespread applications, advances in target tracking drive cascades of new medical, social, and scientific capabilities. In particular, this dissertation advances …
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Extreme wave impact on a flexible plate
… to find plate deflection over time. The dynamic beam bending equation was used to find the forces experienced by the plate, which were compared to the pressure results. A series of waves of different heights and breaking locations were tested, controlled by the ratio of the height of water …
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Local Continuum Sensitivity Method for Shape Design Derivatives Using Spatial Gradient Reconstruction
… including linear and nonlinear static beam bending, linear and nonlinear transient gust analysis of a 2-D beam structure, linear and nonlinear static bending of rectangular plates, linear and nonlinear static bending of a beam-stiffened plate, and two-dimensional potential flow. The …
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A Novel Approach to Residual Stress Measurement
… and an accepted closed form solution for beam bending. A circular strain gage is evaluated to quantify strain under linear-elastic deformation, local plastic deformation, and fully plastic deformation of a material by means of mapping the strain fields about a hole for these deformation …
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Bragg grating filters for optical networks
… tuning of fibre gratings, which adopts the beam bending technique.<br/>It demonstrates over 110 nm tuning range and the operational wavelength can be accurately predicted. Its spectral response and limitations are also studied. This device has been incorporated into several optical systems, …
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Passive gust load alleviation through bend-twist coupling of composite beams on typical commercial airplane wings
… An analytical formulation of the orthotropic box beam bending stiffness matrix is derived by combining Euler-Bernoulli beam theory and classical laminated plate theory. The out-of-plane displacement due to the twist of the cross section is modeled by a bilinear warping function. The analytical …
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Mechanics of jammed media used as a structural element
… of jammed structures subjected to three point bending. It does so by examining the forces between the individual particles and using simple beam bending mechanics. A downward trend was observed in the strength of a jammed structure relative to the grain size of the granular media. This trend …
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Physical finite elements
… as of large assemblies, models synthesized from beam bending equations outperform more complicated and computationally intensive finite element simulations. Finally, we undertake an ambitious design study using these tools, using both simulation and physical testing to predict performance. The …
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Effect of boundaries on swimming of Paramecium multimicronucleatum
… between: a directed, a meandering and a self-bending behaviors. During the self-bending mode the cell body exerts forces on the walls; which is quantified by using a beam bending analogy and measuring the elasticity of the cell body. The first inves- tigation reveals the complicated swimming …
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Three-dimensional polymeric capillary network: fabrication and applications
… surface-oriented swelling in a curved polymeric beam, which also affected its bending direction. Compared with traditional silicon MEMS devices, using this method we achieved much higher actuation displacement with respect to the length of the beam without sacrificing the actuation speed. To …
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