Sökning: "Finite strain"

Visar resultat 6 - 10 av 298 avhandlingar innehållade orden Finite strain.

  1. 6. Finite Element and Neuroimaging Techniques toImprove Decision-Making in Clinical Neuroscience

    Författare :Xiaogai Li; Svein Kleiven; Hans von Holst; Bernhard A Schrefler; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Traumatic brain injury; Intracranial Pressure; Brain edema; Gravitational force; Finite Element Model; Poroelastic parameter; Decompressive craniotomy; Image registration; Water content; Strain level; Diffusion Weighted Imaging;

    Sammanfattning : Our brain, perhaps the most sophisticated and mysterious part of the human body, to some extent, determines who we are. However, it’s a vulnerable organ. When subjected to an impact, such as a traffic accident or sport, it may lead to traumatic brain injury (TBI) which can have devastating effects for those who suffer the injury. LÄS MER

  3. 7. Class of Accurate Low Order Finite Elements

    Författare :Magnus Fredriksson; Hållfasthetslära; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; quadrilateral ; variational ; finite element ; element technology ; HuWashizu ; hexahedral ; Technological sciences; Teknik;

    Sammanfattning : High accuracy and low computational costs are essential properties for efficient finite element codes. Improvements of the finite element method in order to satisfy these qualities have been the subject for extensive research activities ever since its introduction. LÄS MER

  4. 8. Development of an Anisotropic Finite Element Head Model for Traumatic Brain Injury Prediction

    Författare :Chiara Giordano; Svein Kleiven; Songbai Ji; KTH; []
    Nyckelord :Axonal Strain; Brain Anisotropy; Traumatic Brain Injury; Finite Element Analysis; Brain Tissue; Constitutive Modeling.; Medical Technology; Medicinsk teknologi;

    Sammanfattning : Traumatic brain injury (TBI) is a worldwide health care problem with very high associatedmorbidity and mortality rates. In particular, the diagnosis of TBI is challenging: symptomsoverlap with other pathologies and the injury is typically not visible with conventionalneuroimaging techniques. LÄS MER

  5. 9. Modeling of evolving anisotropy at finite elasto-plastic strain

    Författare :Magnus Harrysson; Hållfasthetslära; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Simulation tools are used to a wide extent in the product development process today, both to obtain better products and to reduce the development time required. Anisotropic materials are utilized in many engineering applications. LÄS MER

  7. 10. Modelling of the Fletcher-Gent effect and obtaining hyperelastic parameters for filled elastomers

    Författare :Rickard Österlöf; Leif Kari; Per-Erik Austrell; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; filled elastomers; natural rubber; carbon black; Fletcher-Gent effect; Payne-effect; finite strain; hyperelastic;

    Sammanfattning : The strain amplitude dependency , i.e. the Fletcher-Gent effect and Payne effect, and the strain rate dependency of rubber with reinforcing fillers is modelled using a modified boundary surface model and implemented uniaxially. LÄS MER