Sökning: "Finite strains"

Visar resultat 16 - 20 av 71 avhandlingar innehållade orden Finite strains.

  1. 16. Modelling of cyclic and viscous behaviour of pearlitic steels. Application to tread braked railway wheels

    Detta är en avhandling från ; Chalmers tekniska högskola; Gothenburg

    Författare :Ali Esmaeili; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Railway wheels; viscoplasticity; tread braking; rolling contact fatigue; full-scale brake rig testing; finite element analysis; plasticity;

    Sammanfattning : Railway wheel and rail materials are subjected to very high stresses and, in some cases, also elevated temperatures. The rolling contact loading results in a multiaxial stress state with a combination of compression and shear. LÄS MER

  2. 17. Nonlinear Creep Model of Paper and Corrugated Board Materials

    Detta är en avhandling från Department of Engineering Logistics, Box 118, 221 00 Lund, Sweden

    Författare :Poorvi Patel; Lunds universitet.; Lund University.; [1999]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Technological sciences; Finite element modeling; Creep-recovery tests; Schapery creep equation; Localbuckling; Orthotropic materials; Teknik;

    Sammanfattning : Models of the nonlinear creep behavior of paper, and of the global buckling , local buckling and creep buckling of corrugated board have been developed. The studies of creep and buckling were limited to climate conditions with constant relative humidity. First the short-term elastic buckling of corrugated board panels was studied. LÄS MER

  3. 18. Traumatic Brain Injuries: Animal Experiments and Numerical Simulations to Support the Development of a Brain Injury Criterion

    Detta är en avhandling från Department of Engineering Logistics, Box 118, 221 00 Lund, Sweden

    Författare :Jacobo Antona; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; traumatic brain injuries; traffic safety; concussions; animal experiments; finite element method;

    Sammanfattning : Traumatic Brain Injuries (TBIs) account for about half of the 1 300 000 annual traffic related deaths and the 50 000 000 injuries worldwide. The burden of TBI is ethically unacceptable and economically unsustainable. LÄS MER

  4. 19. Biomechanics of the Human Eye and Intraocular Pressure Measurements

    Detta är en avhandling från Stockholm : KTH

    Författare :Darja Ljubimova; KTH.; [2009]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; IOP; GAT; ocular biomechanics; corneoscleral envelope; finite element modelling; parametric analysis; TECHNOLOGY Engineering mechanics; TEKNIKVETENSKAP Teknisk mekanik;

    Sammanfattning : This thesis addresses the reliability of Goldmann-type applanation tonometers (GAT). It deals with the investigation of the relation between predicted intraocular pressure, IOPG and true pressure, IOPT. LÄS MER

  5. 20. Simulation of stainless steel tube extrusion

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Hansson Sofia; Sofia Hansson; Luleå tekniska universitet.; [2006]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Simulering av extrusion av rostfria rör; Extrusion; finite element method; stainless steel; physically based material model; dislocation density; Material Mechanics; Materialmekanik;

    Sammanfattning : The simulation of hot extrusion processes is a difficult and challenging problem in process modeling. This is due to very large deformations, high strain rates and large temperature changes during the process. LÄS MER