Sökning: "Constitutive modelling"

Visar resultat 1 - 5 av 104 avhandlingar innehållade orden Constitutive modelling.

  1. 1. Cemented Carbide Sintering Constitutive Relations and Microstructural Evolution

    Detta är en avhandling från Stockholm : Materialvetenskap

    Författare :Anders Petersson; KTH.; [2004]
    Nyckelord :Cemented carbides; Sintering; Constitutive relations; Microstructure; Densification; Modelling;

    Sammanfattning : Cemented carbides based on tungsten carbide and cobalt arecommonly produced by a powder metallurgy route including liquidphase sintering. The pressed compact densifies to almost halfits volume during sintering due to pore elimination. LÄS MER

  2. 2. Behaviour and modelling of a natural soft clay triaxial testing, constitutive relations and finite element modelling

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Bo Westerberg; Luleå tekniska universitet.; [1999]

    Sammanfattning : The main objectives if the research project have been to create an experimental basis for a more general theoretical modelling of Swedish clays and to improve the knowledge of the mechanical behaviour of natural soft clays. Another objective has been to investigate the effects of end restraint on the mechanical behaviour obtained in triaxial tests, by means of numerical simulations. LÄS MER

  3. 3. Experimental and Modelling Studies on the Spreading of Non-Aqueous Phase Liquids in Heterogeneous Media

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Fritjof Fagerlund; Uppsala universitet.; [2006]
    Nyckelord :Hydrology; NAPL; Multi-phase flow; Modelling; Experiment design; Heterogeneity; Constitutive relations; Multi-constituent contaminants; Capillary pressure; Relative permeability; Hysteresis; Hydrologi;

    Sammanfattning : Non-Aqueous Phase Liquids (NAPLs) include commonly occurring organic contaminants such as gasoline, diesel fuel and chlorinated solvents. When released to subsurface environments their spreading is a complex process of multi-component, multi-phase flow. LÄS MER

  4. 4. Simulation of welding and heat treatment modelling and validation

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Henrik Alberg; [2005]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Datorstödd maskinkonstruktion; Computer Aided Design;

    Sammanfattning : Many aerospace components with complex geometry are fabricated from smaller parts using joining techniques such as welding. Welding and the heat treatment which usually follows, can result in unwanted deformation and stresses. LÄS MER

  5. 5. Hydro-mechanical forming of aluminium tubes on constitutive modelling and process design

    Detta är en avhandling från Institutionen för konstruktions- och produktionsteknik

    Författare :Mikael Jansson; Linköpings universitet.; Linköpings universitet.; [2006]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hydroforming; Aluminium Extrusions; Anisotropic material; TECHNOLOGY Engineering mechanics Solid mechanics; TEKNIKVETENSKAP Teknisk mekanik Fastkroppsmekanik;

    Sammanfattning : Tube hydroforming is a forming method which has several advantages. By using pressure in combination with material feeding it is possible to manufacture products with high structural integration and tight dimensional tolerances. The forming method is especially suited for aluminium alloys which have a relatively low ductility. LÄS MER