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 706 for “"FEM"”.
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FEM Analysis of Quasi-Planar Transmission Lines
The high frequency wireless communication and high-speed electronics industries are demanding increasingly more sophisticated microwave integrated circuits. Today, conventional microwave integrated circuits have used single substrate planar microstrip line or suspended and inverted microstrip …
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FEM updating applications using Computational Intelligence Techniques [Applicazioni di updating di FEM utilizzando tecniche di Tecniche di intelligenza computazionale]
… dei modelli agli elementi finiti (FEM) che vengono utilizzati per modellare strutture complesse, anche nel campo dell'ingegneria strutturale e in particolare per la modellazione di ponti, gallerie ecc. In particolare, questo lavoro di tesi è stato orientato all'analisi e allo …
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Fem of electrospinning compared to inkjet printing model
Electrospinning is a process that uses electrostatic forces to produce nanofibers, or fibers in the nano scale. Nanofibers are widely used in many fields like drug delivery and tissue engineering. Nowadays, it is gaining much attention in the research community as an advantageous process. However, …
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FEM simulation of ultrasonic wave propagation in solid rods
… of the ultrasonic wave propagations. In the FEM analyses, each specimen with the same input is generated for comparing with the experimental results. In addition, the input frequency, element size, and integration time step are discussed to evaluate the accuracy of the FEM results. The output …
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An Innovative Coupling Scheme of FEM And BEM Solvers
… Element Method (BEM) and Finite Element Method (FEM) solutions in the direct time domain for linear elasticity and wave propagation problems. The MSIC allows for independent selection of time step in each of the solvers and has been shown to be highly accurate, stable and efficient. This work …
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A fast enriched FEM for Poisson equations involving interfaces
We develop a fast enriched finite element method for solving Poisson equations involving complex geometry interfaces by using regular Cartesian grids. The presence of interfaces is accounted for by developing suitable jump conditions. The immersed boundary method (IBM) and the immersed interface …
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Error Assessment in FEM Calculations of Flows with Moving Boundaries
A Finite Element numerical method has been developed to simulate the fluid flow over two dimensional and time dependent domains with rigid moving objects or boundaries. This method falls under the general category of Arbitrary Lagrangian Eulerian methods. In this method the global mesh is fixed and …
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Dynamic investigation of vibratory screen response in a FEM environment
… intelligent method was also trained using the FEM data and then used to classify the physical screen data.
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Exploring Immersed FEM, Material Design, and Biological Tissue Material Modeling
… the Immersed Interface Finite Element Method (IIFEM) for shape optimization and material design, while also investigating the modeling and parameterization of lung tissue for Diver Underwater Explosion (UNDEX) simulations. In the first part, a shape optimization scheme utilizing a four-noded …
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Active deformation in the southern Andes from GPS and FEM models
… im Forearc mittels 3D viskoelastische FEM. Die mittels GPS abgeleiteten Geschwindigkeiten zeigen eine heterogene Oberflächendeformation, welche jener seismotektonischen Segmentierung sehr ähnelt, die durch die Ausbrüche der beiden zurückliegenden Megathrust Erdbeben in Concepción 1835 …
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A New Singular S-FEM For The Linear Elastic Fracture Mechanics
A new approach of singular S-FEM has been proposed in this dissertation for the linear elastic fracture mechanics problems in both two and three dimensional spaces. A softer model than that of FEM has been developed by using strain smoothing technique on a set of non-overlapping and no-gapping …
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Hybrid explicit-implicit FDTD-FEM time-domain solver for electromagnetic problems
… Time-Domain (FDTD) method and Finite-Element (FEM) method are numerical techniques used for solving Maxwell's electromagnetic equations. FDTD-FEM hybrid methods opt for combining the advantages of both FDTD and FEM. In this dissertation, signal processing techniques were used to analyze the …
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Development of Surrogate Model for FEM Error Prediction using Deep Learning
This research is a proof-of-concept study to develop a surrogate model, using deep learning (DL), to predict solution error for a given model with a given mesh. For this research, we have taken the von Mises stress contours and have predicted two different types of error indicators contours, namely …
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The application of FEM technique to electromagnetic models for magnetic neural stimulation
Several aspects of magnetic neural stimulation are investigated by applying an advanced finite-element analysis. The objective is to demonstrate that the finite element method is well suited for realistic bio-electromagnetic modelling. The focus of our research is to explore four factors which …
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Coupling of Structural Dynamic and Acoustic Analyses Using the FEM and BEM
… In this study, the finite element method (FEM) is chosen for the structural dynamic analysis in order to calculate the natural frequencies and harmonic responses of the structure. The boundary element method (BEM) is used in the acoustic analysis of the structure to calculate the radiated …
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Image-Based Modeling of Porous Media Using FEM and Lagrangian Particle Tracking
… of Stokes flow using both finite element (FEM) and Lattice Boltzmann methods. NPs have been widely used commercially and have the potential to be extensively used in petroleum engineering as stabilizers in enhanced oil recovery operations or as tracers or sensors to detect rock and fluid …
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Geometrically-necessary dislocation density in continuum plasticity theory, FEM implementation and applications
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Analysis of the pressuremeter test by FEM formulation of the elasto-plastic consolidation
A decade has passed since the development of the self-boring pressuremeter (SBPM). Even though the device has been recognized by the geotechnical engineering profession as having high promise for evaluating in-situ stress-strain behavior of soils, its use is limited. In large part, this is due to …
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