Sökning: "stress-effects"

Visar resultat 1 - 5 av 18 avhandlingar innehållade ordet stress-effects.

  1. 1. Phase change with stress effects and flow

    Författare :Amer Malik; Gustav Amberg; Long-Qing Chen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Martensitic transformation; phase-field method; polycrystal; stress-effects; microactuator; finite-element simulations.;

    Sammanfattning : In this thesis two kinds of phase change i.e., solid state phase transformation in steels and solid-to-liquid phase transformation in paraffin, have been modeled and numerically simulated. LÄS MER

  3. 2. Stress Effects on Solute Transport in Fractured rocks

    Författare :Zhihong Zhao; Lanru Jing; Ivars Neretnieks; Auli Niemi; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fractured rocks; Solute transport; Stress effects; Coupled stress-flow-transport processes; Analytical solution; Particle mechanics model; Fracture surface damage; Discrete element method; Particle tracking method;

    Sammanfattning : The effect of in-situ or redistributed stress on solute transport in fractured rocks is one of the major concerns for many subsurface engineering problems. However, it remains poorly understood due to the difficulties in experiments and numerical modeling. LÄS MER

  4. 3. Upscaling of Flow, Transport, and Stress-effects in Fractured Rock

    Författare :Johan Öhman; Auli Niemi; Ove Stephansson; Robert W Zimmerman; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Hydrology; Upscaling; fractured media; flow; solute transport; thermo-hydro-mechanical processes; hybrid approach; continuum approximation; discrete fracture network; stochastic continuum; Hydrologi; Hydrology; Hydrologi;

    Sammanfattning : One of many applications of geohydraulic modelling is assessing the suitability of a site to host a nuclear waste repository. This modelling task is complicated by scale-dependent heterogeneity and coupled thermo-hydro-mechanical (THM) processes. LÄS MER

  5. 4. Scale and Stress Effects on Hydro-Mechanical Properties of Fractured Rock Masses

    Författare :Alireza Baghbanan; Lanru Jing; Jian Zhao; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Aperture-trace length correlation; Discrete Fracture Network DFN ; Representative Elementary Volume REV ; Strength; Stress-Strain curve; Discrete Element Method DEM ; Stress effect; Deformability of fractures; Earth sciences; Geovetenskap;

    Sammanfattning : In this thesis, the effects of size and stress on permeability, deformability and strength of fractured rock masses are investigated. A comparison study was carried out to examine the effects of considering, or not considering, the correlation between distributions of fracture apertures and fracture trace lengths on the hydro-mechanical behavior of fractured rocks. LÄS MER

  7. 5. How does IT feel @ work? And how to make IT better : Computer use, stress and health in office work

    Författare :Carl Åborg; Lena Mårtensson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; office work; work environment; occupational health; stress; human - computer interaction; system development; usability; Computer science; Datavetenskap; Datavetenskap med inriktning mot människa-datorinteraktion; Computer Science with specialization in Human-Computer Interaction;

    Sammanfattning : The introduction of computers in working life has changed the very nature of many jobs and the entire work situation for a great number of people. How has this affected the individual´s health and well being? With the large increase in the use of computers we have witnessed an increase in reports on negative effects on users´health. LÄS MER