Sökning: "Representative Volume Element"

Visar resultat 11 - 15 av 32 avhandlingar innehållade orden Representative Volume Element.

1. 11. Electroosmosis Based Treatment Approach for Cerebral Edema

   Författare :Teng Wang; Xiaogai Li; Svein Kleiven; Tiit Illimar Mathiesen; KTH; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cerebral edema; electroosmosis based treatment; finite element head model; electroosmotic flow; Technology and Health; Teknik och hälsa;

   Sammanfattning : Cerebral edema characterized as an abnormal accumulation of excess fluid in the intracellular or extracellular spaces has not been treated effectively despite aggressive treatments. As a result, cerebral edema often leads to intracranial pressure (ICP) elevation with potentially severe consequences unless treated effectively. LÄS MER

3. 12. 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

4. 13. Meso-Mechanical Modeling of Thin Adhesive Layers

   Författare :Kent Salomonsson; Högskolan i Skövde; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; adhesive layer; meso-mechanical; FEM; RVE; SEM; Engineering mechanics; Teknisk mekanik; Technology; Teknik;

   Sammanfattning : A thin adhesive layer is analyzed using a representative volume element (RVE). The RVE is comprised by, both continuum and interfacial finite elements. The interface elements allow for crack initiation and crack propagation. To obtain realistic results from the RVE simulation, an in situ scanning electron microscopy (SEM) study is performed. LÄS MER

5. 14. Multi-scale analysis of mechanical phenomena in NCF composites

   Författare :David Mattsson; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polymera konstruktionsmaterial; Polymeric Composite Materials;

   Sammanfattning : Mechanical phenomenon in Non Crimp Composites is studied in this thesis using a multiscale approach. This approach is choosen due to the architecture of the composite which is heterogenic both on micro as well as mesoscale. LÄS MER

7. 15. Micromechanical modeling using computational homogenization

   Författare :Ola Kristensson; Mekanik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Metal technology; metallurgy; metal products; Metallurgi; materialteknik; Materiallära; Material technology; numerics; micromechanics; homogenization;

   Sammanfattning : This thesis addresses micromechanical modeling of materials using computational homogenization. On this topic, theoretical and computational issues are discussed, and numerical investigations of different material systems are performed. LÄS MER