Search for dissertations about: "non-linear FEM"

Showing result 1 - 5 of 30 swedish dissertations containing the words non-linear FEM.

  2. 1. Two Problems in non-linear PDE’s with Phase Transitions

    Author : Karl Jonsson; Henrik Shahgholian; Tomas Sjödin; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Conductivity jump; Free boundary problem; Quasilinear elliptic equation; Mathematical techniques; Nonlinear analysis; Free boundary; Free-boundary problems; Quasi-linear elliptic; Quasilinear elliptic equations; Hele-Shaw flow; non-local; implicit function theorem; Heterogeneous Multi Scale; HMM; Finite Element; FEM; FE; Mathematics; Matematik;

    Abstract : This thesis is in the field of non-linear partial differential equations (PDE), focusing on problems which show some type of phase-transition. A single phase Hele-Shaw flow models a Newtoninan fluid which is being injected in the space between two narrowly separated parallel planes. READ MORE

  4. 2. Multiphase continuum modeling of wood : A hybrid mixture theory approach

    Author : Winston Mmari; Björn Johannesson; Lynn Schreyer; Linnéuniversitetet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Moisture transport; Coupled heat and moisture; Over-hygroscopic; Hybrid mixture theory; Mixture theory; Swelling; Hygro-mechanical; Non-linear elasticity; Large deformation; Phase field crack model; Anisotropic cracking; FEM; Numerical model; Norway spruce; Wood; Porous media; Forestry and Wood Technology; Skog och träteknik;

    Abstract : Wood has been used as a construction material for a very long time. The development of efficient industrial production processes of wood has expanded the use of the material with the introduction of new products, such as engineered wood products. READ MORE

  5. 3. Demagnetization Studies on Permanent Magnets : Comparing FEM Simulations with Experiments

    Author : Stefan Sjökvist; Sandra Eriksson; Hans Bernhoff; Mårten Grabbe; Uppsala universitet; []
    Keywords : Permanent magnet; demagnetization; simulation; FEM; Comsol Multiphysics; VAWT; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Abstract : In a world where money often is the main controlling factor, everything that can be tends to be more and more optimized. Regarding electrical machines, developers have always had the goal to make them better. READ MORE

  6. 4. Computational Road Mechanics - with Emphasis on FE-analysis of Rutting

    Author : Johan Olsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; non-linear FEM; multi-layer structure; asphalt concrete; road design; material models; unbound material;

    Abstract : A road is a very complex structure in which a large number of different structural phenomena occur simultaneously that effects its expected lifetime. The structure itself is of a multi-layer type, in which the different layers consist of materials that exhibit vastly different physical behaviors when subjected to various kinds of loads. READ MORE

  7. 5. Finite Element Procedures in Modelling the Dynamic Properties of Rubber

    Author : Anders K Olsson; Byggnadsmekanik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; akustik; vibration and acoustic engineering; Materiallära; materialteknik; Mechanical engineering; hydraulics; vacuum technology; Material technology; dynamic; amplitude; frequency; Technological sciences; Teknik; FEM; rubber; vibrationer; vakuumteknik; Maskinteknik; hydraulik;

    Abstract : Rubber is not only a non-linear elastic material, it is also dependent on strain rate, temperature and strain amplitude. The non-linear elastic property and the strain amplitude dependence give a non-linear dynamic behavior that is covered by the models suggested in this thesis. READ MORE