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 56 for “"quasistatic"”.
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Quasistatic computing environments
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Performance enhancement of segmented infrared reflectors via quasistatic shape control
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1992.
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Improvement of glass curtain wall connections subjected to quasistatic and dynamic loading
… (DIF) to help correlate the responses from the quasistatic testing to the dynamic testing in terms of peak load. Finally, experimental work was conducted on full-scale mullion specimens subjected to quasi-static loads. These samples demonstrated the behavioral differences between flexural …
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Fast parasitic extraction and simulation of three-dimensional interconnect via quasistatic analysis
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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Modeling, Parameter Estimation and Compensation of Quasistatic Errors in Multi-Axis CNC Machining Centers
Dimensional accuracy is often the single most critical criterion that can be used to evaluate the quality of machined parts. Increasing demand for highly accurate and inexpensive mechanical parts has created a critical need for developing economical and efficient processes for their production.
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Design, manufacture and commissioning of a low pressure quasistatic bulge tester for skin and membrane tissue
The material properties of skin are of great importance to a variety of fields such as dermatology and reconstructive surgery. Relatively little infrastructure and expertise exists locally in South Africa for testing biological tissue. The difficulties of testing the material properties of skin are …
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Experimental and numerical study on the effect of strain rate to ductile damage
… not include strain rate or temperature effects. Quasistatic tests are often used in calibration, even though many applications such as automotive accidents and ballistic impact operate in the dynamic range. Thus the aims of this thesis were to develop a system to test the damage properties of …
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Experimental and numerical study on the effect of strain rate to ductile damage
… not include strain rate or temperature effects. Quasistatic tests are often used in calibration, even though many applications such as automotive accidents and ballistic impact operate in the dynamic range. Thus the aims of this thesis were to develop a system to test the damage properties of …
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Quasistatisch auslenkbarer Kippspiegel zur Ablenkung von Licht
This dissertation concerns quasistatic torsional mirror's for optical applications. The intended main area of application is the use as switch in optical network's, replacing the conventional optical-electro-optical conversation. With these actuator's a new concept of electrostatic actuation has …
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Failure of Microelectromechanical Systems Under Dynamic Loading: An Experimental and Numerical Investigation
… measurements of failure stress (measured in quasistatic microtensile tests) in an attempt to predict failure. High-speed imaging was also used to capture the first real-time images of MEMS structures responding to dynamic loading.
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Planning for Dynamic Nonprehensile Object Transport
… handle initial or final goal states defined as quasistatically infeasible, in which purely quasistatic motions cannot generate a warm start trajectory. We also design an indirect adaptive controller that can track a desired dynamic grasping trajectory assuming unknown object mass and location …
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Adaptive finite elements for viscoelastic deformation problems
… algorithms for the numerical solution of the quasistatic equations governing the small displacement of a viscoelastic body subjected to prescribed body forces and tractions. Such algorithms for the hereditary integral formulation have appeared in the literature. However the approach here is to …
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Effect of Material and Geometric Parameters on Deformations of a Dynamically loaded Prenotched Plate
… 2.3 times the yield stress of the material in a quasistatic simple tension or compression test. We assume that the brittle fracture occurs when the maximum tensile principal stress equals twice the yield stress of the material in a quasistatic simple tension test and a shear band initiates when …
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Initial Value Problems for Creeping Flow of Maxwell Fluids
… flow of nonlinear Maxwell fluids in the unsteady quasistatic case, where the effect of inertia is neglected. We study the well-posedness of the resulting PDE initial-boundary value problem. This well-posedness depends on the unique solvability of an elliptic boundary value problem. We first …
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Numerical Investigations of Magnetohydrodynamic Hypersonic Flows
… and length scales in this problem justifies the quasistatic approximation, which assumes negligible effect of velocity onmagnetic fields. Therefore the governing equations employed in the simulations are the compressible Navier-Stokes and the energy equations with MHD-related sourceterms such as …
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Physically-based animation of plant motions
… motion. Previous works tend to either focus on quasistatic simulations - which by defnition assume the absence of non-inertial effects - or ignore secondary motion in their dynamics calculations altogether. Either of these result in incomplete simulations that do not adequately capture the wide …
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Enhanced modeling methodology for system-level electrostatic discharge simulation
… regression is used to generate an enhanced quasistatic I-V model of an IC pin, which reflects its dependency on the circuit board’s power delivery network. S-parameter measurements enable the development of a model for an IEC 61000-4-2 ESD source that comprehends the coupling among the …
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Creep properties of corrugated fibreboard containers for produce in simulated road transport environment
… however for routine performance testing the quasistatic methods are more appropriate.
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Acceleration of heavy Ions to MeV/nucleon Energies by Ultrahigh-Intensity Lasers
… electrons penetrate the target foil and set up a quasistatic electric field at the target rear surface. This field is of the order of TV/m and accelerated Fluorine ions to energies of 100 MeV, i.e. about 10 % light speed, within 300 fs. While a normal accelerator needs a distance of roughly 100 m …
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Imaging of absolute electrical properties using electroquasistatic and magnetoquasistatic sensor arrays
… research focuses on the enhancement of electroquasistatic and magnetoquasistatic nondestructive evaluation techniques. The terminals of the sensors involved are connected to conductors which are traditionally located on a single plane and have a spatially-periodic structure. The sensor operates …
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