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.
Results
Showing 1 to 20 of 24 for “"Local Deformation"”.
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Constrained parameterization with applications to graphics and image processing.
… is the development of a vector field based deformation algorithm for 2D mesh deformation and image warping. Many presented deformation approaches are used to employ the basis functions (including our proposed RBF-based re-parameterization algorithm here). The main problem is that such …
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Mechanochemical transformations: Bridging the gap between global and local kinetics
… the investigation of the reaction kinetics on a local scale extremely challenging. The thesis endeavours to gain insight into the local kinetics from macroscopic experimental evidence. To this aim, we developed a kinetic model that rationalizes the kinetics of mechanochemical transformations …
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On the observations of autowaves and avalanches in an aluminum magnesium alloy
… attempts to answer the question of what the local deformation characteristics look like in a dynamically strain aging material before the onset of macroscopic instability. A solution strengthened aluminum magnesium alloy was tested in a work hardened condition in uniaxial tension under a …
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Production of a nanostructured copper by Spark Plasma Sintering
… has been investigated. Particle rearrangement, local deformation, bulk deformation and sintering are the SPS mechanisms occurring successively during the sintering process of the atomized copper. These mechanisms are enhanced by the peculiar heating mechanism in SPS, and the surface overheating …
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Strength and Life Prediction of FRP Composite Bridge Deck
… behavior of FRP decks. For example, due to the localization of load under a truck tire, the conventionally used uniform patch loading is not suitable for performance evaluation of FRP composite deck systems with cellular geometry and relatively low modulus (compared to concrete decks). In this …
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Engineering safety analysis of EV Li-ion batteries for mini zing auto insurance losses
… and Crashworthiness Lab (ICL) at MIT on the deformation and failure of Li ion batteries subjected to mechanical abuse conditions, to address the challenges of the auto insurance industries. This work includes three key deliverables. Firstly, a qualitative risk analysis of failure modes at …
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The Taylor-Wiles method for reductive groups
We construct a local deformation problem for residual Galois representations ρ valued in an arbitrary reductive group Ĝ which we use to develop a variant of the Taylor–Wiles method. Our generalization allows Taylor–Wiles places for which the image of Frobenius is semisimple, a weakening of the …
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Mechanics of abrasive wear of elastomeric materials
… materials due to their ability to undergo large deformations and conform to the mating surface. However, their applications often result in repeated contact with abrasive particles, which act to abrasively wear the elastomers. Elastomeric materials are observed to exhibit a characteristic form of …
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Analysis Driven Shape Design of Parametric Geometry Using B-Splines and Free-Form Deformation
This thesis presents a method for local aerodynamic shape optimization to morph parametric geometry. The goal is a general framework for analysis driven shape design that combines CAD-like parametric solid model geometry construction with free-form-like local deformation. One method explored uses …
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Vector-valued multidimensional signal processing and analysis in the context of fluid flows
… pointwise linear approximation of flow fields, local fluid motion classification, and vortex structure extraction. The model defined in this work is a generic one, with emphasis on the global properties of vortex structures. It is shown that through this pointwise linear approximation, a flow …
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Virtual environments for medical training : graphic and haptic simulation of tool-tissue interactions
… based real time soft tissue models - the local deformation and the hybrid deformation model - were developed to compute interaction forces and visual deformation fields that provide real-time feed back to the user. Second, a system to measure in vivo mechanical properties of soft tissues …
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High resolution interferometric measurements of residual strains in composites
… that is required for the measurement of local deformation of composites on a ply·by-ply basis, or give point-by-point and averaged information. Also they are incapable of resolving the complexity of combined effect of different residual stress components. I n order to measure residual …
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An investigation of the electromagnetic coupling problem by means of a rational framework and selected experiments
… in the literature. In the experiment, the local deformation of an oil drop subjected to an electric field is investigated. The theoretical predictions of the considered force models are compared to the experimental data. The evaluation shows that the generalized \textsc{Lorentz} model is …
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Language-Guided 4D Object Reconstruction from Videos
… during reconstruction. To address this, a motion-deformation-decoupled dynamic 3DGS structure is designed to estimate the object's large overall motion and the local deformation separately, which can represent highly dynamic objects better. Additionally, monocular casual video has an inherent …
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Micro/Nano-Scale Investigation on SN Alloys and SNO2 Nanowires
… The mechanical properties of each phase and the local deformation mechanisms have been considered. Secondly, the Sn whisker growth phenomenon is to be re-visited. With the aid of digital image correlation (DIC) techniques, it was found that magnitude of the strain gradient plays an important role …
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DESIGN, MANUFACTURING, AND CHARACTERIZATION OF SOFT, CAPACITIVE ACTUATORS AND ARCHITECTED DIELECTRIC ELASTOMERS
… the transformation of an object’s shape, sense local deformation, or even alter the transmission of electromagnetic waves in the surrounding envi- ronment. This work develops and characterizes soft material systems and fab- rication frameworks for multi-dimensional mobility and topological …
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Recrystallisation in Single Crystal Nickel-Based Superalloys
… between the metal and ceramic mould-and-core. If deformation is above a critical limit, subsequent solution heat treatment of the alloy causes recrystallisation. Crack nucleation and propagation is preferred at the recrystallisation grain boundaries, and this significantly reduces the creep and …
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Development of an enhanced microstructure–level machining model for carbon nanotube reinforced polymer composites using cohesive zone interface
… variable temperature and strain rate over the deformation zone during machining, temperature– and strain rate–dependent mechanical properties for the interface and the polymer material are also obtained and considered in the model. The results show that the model can predict cutting forces …
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Two-dimensional infrared spectroscopy of nucleic acids : application to tautomerism and DNA aptamer unfolding dynamics
… due to the difficulties in modeling highly delocalized and coupled vibrations of nucleobases. This thesis initiated the efforts to develop 2D IR spectroscopy of nucleic acids by first characterizing the 2D IR spectra and vibrational eigenstates of nucleobases, using a model of multiple …
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Development and Validation of Non-Invasive Methods for the Identification of Patient-Specific Hyperelastic and Anisotropic Material Properties of Abdominal Aortic Aneurysms In Vivo
An abdominal aortic aneurysm (AAA) is a permanent local dilatation of the human abdominal aorta, posing a severe health risk due to a rupture related mortality rate of up to 85 percent. Current clinical risk assessment relies on a population derived threshold value for the maximum aneurysm …
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