Search for dissertations about: "Finite Element Methods"

Showing result 1 - 5 of 440 swedish dissertations containing the words Finite Element Methods.

  1. 1. On failure modelling in finite element analysis material imperfections and element erosion

    University dissertation from Institutionen för konstruktions- och produktionsteknik

    Author : Mattias Unosson; Linköpings universitet.; Linköpings universitet.; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; finite element method; element erosion; material failure; material imperfections; crack-tip; TECHNOLOGY Engineering mechanics Solid mechanics; TEKNIKVETENSKAP Teknisk mekanik Fastkroppsmekanik;

    Abstract : This dissertation concerns failure modelling with material imperfections and element erosion in finite element analyses. The aim has been to improve the element erosion technique, which is simple to use and implement and also computationally inexpensive. READ MORE

  2. 2. Adaptive finite element methods for multiphysics problems

    University dissertation from Umeå : Institutionen för Matematik och matematisk statistik, Umeå universitet

    Author : Fredrik Bengzon; Umeå universitet.; [2009]
    Keywords : finite element methods; multiphysics; a posteriori error estimation; duality; adaptivity; discontinuous Galerkin; fractional step methods;

    Abstract : In this thesis we develop and analyze the performance ofadaptive finite element methods for multiphysics problems. Inparticular, we propose a methodology for deriving computable errorestimates when solving unidirectionally coupled multiphysics problemsusing segregated finite element solvers. READ MORE

  3. 3. Finite element methods for multiscale/multiphysics problems

    University dissertation from Umeå : Department of Mathematics and Mathematical Statistics, Umeå University

    Author : Robert Söderlund; Umeå universitet.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; finite element methods; variational multiscale methods; Galerkin; convergence analysis; multiphysics; a posteriori error estimation; duality; adaptivity; MATHEMATICS Applied mathematics Mathematical statistics; MATEMATIK Tillämpad matematik Matematisk statistik; Mathematical Statistics; matematisk statistik;

    Abstract : In this thesis we focus on multiscale and multiphysics problems. We derive a posteriori error estimates for a one way coupled multiphysics problem, using the dual weighted residual method. READ MORE

  4. 4. High-Performance Finite Element Methods with Application to Simulation of Diffusion MRI and Vertical Axis Wind Turbines

    University dissertation from KTH Royal Institute of Technology

    Author : Van-Dang Nguyen; KTH.; [2018]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; High performance finite element method; computational diffusion MRI; turbulent flow; vertical axis wind turbine.; Datalogi; Computer Science;

    Abstract : The finite element methods (FEM) have been developed over decades, and together with the growth of computer engineering, they become more and more important in solving large-scale problems in science and industry. The objective of this thesis is to develop high-performance finite element methods (HP-FEM), with two main applications in mind: computational diffusion magnetic resonance imaging (MRI), and simulation of the turbulent flow past a vertical axis wind turbine (VAWT). READ MORE

  5. 5. Modelling Alternative Load Paths in Platform-Framed CLT Buildings A Finite Element Approach

    University dissertation from Luleå : Luleå University of Technology

    Author : Johannes Albert Josef Huber; Luleå tekniska universitet.; [2019]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; timber; robustness; finite element method; alternative load paths; disproportionate collapse; Träteknik; Wood Science and Engineering;

    Abstract : Timber has become more popular as a construction material during recent years. Engineered wood products, such as glued laminated timber and cross-laminated timber, have enabled the construction of multi-storey buildings. Tall buildings with many occupants need to resist a disproportional collapse in case of unexpected exposures, e.g. READ MORE