Sökning: "Mesh dependence"

Visar resultat 1 - 5 av 12 avhandlingar innehållade orden Mesh dependence.

  1. 1. Computational modelling of machining - Mesh objective ductile damage modelling

    Författare :SENAD RAZANICA; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ductile damage; fracture modeling; Mesh dependence; machining process; visco-plastic Johnson- Cook; simulation tool; FEM;

    Sammanfattning : AbstractTo strengthen the competitiveness the manufacturing industry strives for a continuousdevelopment of cost efficient manufacturing processes and improved product quality.These research and development issues are addressed by increasing the implementationof simulation tools based on finite element method (FEM). LÄS MER

  2. 2. Ductile damage modeling of the machining process

    Detta är en avhandling från Gothenburg : Chalmers tekniska högskola

    Författare :SENAD RAZANICA; [2019]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ductile fracture; Damage threshold criterion; Damage evolution; Machining simulation; Mesh dependence; Thermodynamics; Johnson-Cook; Damage driving energy;

    Sammanfattning : Machining processes are among the most common manufacturing processes for producing components used on a daily basis. It is a complex material removal process. Today, the research and development within the manufacturing industry is addressed by cost efficient numerical simulation strategies rather than by costly experimental procedures. LÄS MER

  3. 3. Parametric stability analyses for fluid-loaded thin membranes

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Yang Zhou; Anders Eriksson; Håkan Johansson; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Membranes; Hydro-static load; Multi-parametric loading; Bifurcations; Generalized path-following; Fold lines; Mesh eects; Augmenting equations; Generalized eigenproblem; Solution surface.; Teknisk mekanik; Engineering Mechanics;

    Sammanfattning : Membrane structures are commonly used in many elds. The studies of thesestructures are of increasing interest. The two projects focus on the evaluations ofequilibrium states for uid-pressurized membranes under dierent loading conditions,and the corresponding instability behavior. LÄS MER

  4. 4. Modeling of cast iron materials related to machining

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Goran Ljustina; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machining simulation; Microstructure; Fracture; Johnson Cook plasticity;

    Sammanfattning : A microstructure level simulation model of cast iron machining based on micrograph image analysis has been developed. The simulation tool has been developed for theorthogonal machining process involving 2D representations of a range of cast iron microstructures. LÄS MER

  5. 5. Numerical Modelling of Diesel Spray Injection and Turbulence Interaction

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Fabian Kärrholm Peng; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Computational Fluid Dynamics; Spray; Cavitation; Cavitation; Turbulence Model; Atomization Turbulence Model; Diesel; Atomization;

    Sammanfattning : It has been established by many authors that numerical simulations ofDiesel sprays, using a Lagrangian description for the liquid phase,are particularly sensitive to the scale of the computational cellscompromising the mesh. There have been many suggestions regardingmeans to reduce the dependency on the mesh by improving the componentsubmodels, but few have addressed the gas phase turbulence modelling. LÄS MER