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 47 for “"FEM model"”.
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Development and Validation of a Bidirectionally Coupled Magnetoelastic FEM Model for Current Driven Magnetostrictive Devices
A bidirectionally coupled magnetoelastic model (BCMEM) has been extended to include electric currents in its magnetic finite element formulation. This enables the model to capture the magnetoelastic behavior of magnetostrictive materials subjected to elastic stresses and magnetic fields applied not …
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SPH Simulation of Fluid-Structure Interaction Problems with Application to Hovercraft
… employs large-deformation Finite Element Method (FEM). Validation tests of SPH and FEM are first performed individually. A loosely-coupled SPH-FEM model is then proposed for solving FSI problems. Validation results of two benchmark FSI problems are illustrated (Antoci et al., 2007; Souto-Iglesias …
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Prediction of Laser Ablation In Brain: Sensitivity, Calibration, and Validation
… stands to benefit from predictive computational modeling. The dearth of physical model parameter data leads to modeling uncertainty. This work implements a well-accepted framework with three key steps for model-building: model-parameter sensitivity analysis, model calibration, and model …
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Use of Bioheat Modeling to Characterize and Optimize Implantable Medical Devices and Neuromodulation Technologies
… and improving patients care. Computational modeling is widely adopted as a powerful tool to predict stimulation/recording parameter optimization, rapid electrode/device prototyping, investigating novel mechanism of action, and testing working principles of any medical devices. Many …
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Generating and Simulating CANDU® Fuel Channel Eddy Current Data to Demonstrate Multi-Parameter Extraction Capabilities
… of interest. This thesis presents an analytical model of the eddy current gap probe response with the addition of a copper plate. This analytical model was shown to have excellent agreement with simulation data from a validated Finite Element Method (FEM) model. Efforts made to detect …
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Contributions to radio frequency indoorpositioning and through-the-wall mapping
… two algebraic – are compared using a path-loss model corrupted by Rayleigh noise in a parallel-beam acquisition geometry. After that, the thesis proposes applying the Finite Element Method (FEM) to simulate several parallel-beam geometry RF TWM setups, providing a more accurate simulation model. …
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Dynamic analysis of Calatrava's la Devesa footbridge
… intensively through the use of ADINA. The FEM model is an attempted reproduction of Calatrava's la Devesa footbridge. While Calatrava has developed the form through several projects, this particular bridge is a relatively clean example of the leaning arch system. The model is subjected to a …
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Design, simulation, and testing of a low cost laser micromachining system for flexible and rapid tissue-on-chip fabrication.
… developed a comprehensive finite element method (FEM) model for the laser ablation process, incorporating key physical phenomena including laser-material interactions, heat transfer, and material removal dynamics. This model, validated against experimental results, accurately predicts ablation …
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FPGA Operating System for Hard Real Time Applications
… implementation passing through: • creation of a FEM model of the piezoelectric stack; • construction of the modal residues model; • FEM model validation; • identification of the electrical equivalent circuit of the piezoelectric stack; • design of the power driver circuit; • design of the control …
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MODELING INTERFASCICULAR INTERFACES FOR PERIPHERAL NERVES
… hypothesized that through Finite Element Method (FEM) models we could show that directed interfascicular electrodes placed within the nerve can achieve levels of selectivity equal to that of intrafasciclular contact without penetrating the perineurium.</p><p>A simplified FEM model of a nerve was …
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Development of a finite element matrix (fem)three-phase three-limb transformer model for Geomagnetically Induced Currents (GIC) experiments
… developing suitable Finite Element Matrix (FEM) models to be used for conducting GIC/DC experiments”. This study thus investigates the response of a 15 kVA 3p3L laboratory transformer to dc current, emulating the effects of GICs. GIC and dc current are the same under steady state conditions, …
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Experimental database, analysis and design of noncompact and slender concrete-filled steel tube (CFT) members
… is compiled. Detailed 3D finite element method (FEM) models are developed for noncompact and slender CFT members, and benchmarked using experimental results. The AISC 360-10 design provisions for noncompact and slender CFT members are then evaluated by both the experimental test results and …
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Modelling of the inertia welding of Inconel 718
… inertia welding process was studied by both an FEM model and three analytical models. The thermal analysis shows that there is a steep temperature gradient near the mating surface, which is the cause for the existence of a band of high hydrostatic stress near the weld line. The holding effect of …
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Air Ingress in HTGRs: the process, effects, and experimental methods relating to its investigation and consequences
… In this work a combination of computational models and mixed effects experiments were used to better understand the air ingress process and its potential effects on the heat removal capabilities of an HTGR design following an air-ingress accident. Contributions were made in the understanding …
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Design, implementation and experimental testing of an inertial sensor system to quantify wing deflection
… and torsion. Initially a static structural model serves as a means to construct deflection measurements using sensor data. System inputs are obtained using 3-axis accelerometers and gyroscopes. Sensor fusion of accelerometer and gyroscopic data is discussed. The system is expanded to …
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Beitrag zur numerischen und experimentellen Untersuchung von liegenden, sattelgelagerten Zylinderschalen unter vertikaler dynamischer Belastung
… purposes. For the numeric calculation a model is generated on basis of the finite-element-method (FEM) with 4-node shell elements after the discreet Kirchhoff'schen theory for the simulation of the vertical oscillation of lying liquid tanks. The contact between saddle and cylindrical …
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Concrete walls founded on earthquake areas
… made by structural engineers of structural models are almost fixed to the ground (cantilever), even though in reality, the structures are founded on bedrock or soil bed. In the project, 10 walls are modeled in a structural software program, five squat walls and five slender walls. The walls …
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Modeling and control of high density microcantilever systems
… can be further verified by using a multimodal model of the cantilever system. The FEM model, as a typical multimodal method, views the cantilever as a more complex structure by cutting it into segments and taking the dynamics of each segment into calculation. Hence this methodology yields a …
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The Use of Synchrotron Radiation to study Overgrowth Phenomena in InAs/GaAs Nanostructures
… nanostructures finite-element simulations (FEM) have been performed. The following sample systems were investigated: ((1)) Free-standing and buried InGaAs quantum dots: Free-standing In(x)Ga(1-x)As islands grown on GaAs (001) by molecular beam epitaxy (MBE) with a nominal concentration of …
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