Sökning: "Constitutive relations"

Visar resultat 1 - 5 av 49 avhandlingar innehållade orden Constitutive relations.

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

    Författare :Anders Petersson; KTH; []
    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

    Författare :Bo Westerberg; Luleå tekniska universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Soil Mechanics; Geoteknik;

    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. Multiresolution Continuum Theory and Dislocation Density Based Constitutive Relations

    Författare :Hao Qin; Luleå tekniska universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Material Mechanics; Materialmekanik; Centre - Centre for High Performance Steel CHS ; Centrumbildning - Centrum för högpresterande stål CHS ;

    Sammanfattning : In classical description, the mechanical state of a material point depends on the variables defined at this point solely. It can integrate and catch some aspects of the material’s microstructure by conventional homogenization method. LÄS MER

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

    Författare :Fritjof Fagerlund; Auli Niemi; Tissa Illangasekare; Karsten Jensen; Uppsala universitet; []
    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

  5. 5. Paraphrase and Rhetorical Adjustment: An Essay on Contextualism and Cohesion

    Författare :Palle Leth; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :anaphora; coherence; cohesion; context sensitivity; contextualism; discourse relations; discourse structure; paraphrase; predicate reference; presupposition; rhetorical adjustment; rhetorical relations; semantics–pragmatics interface; text structure; transcendental; translation; word meaning;

    Sammanfattning : This thesis is dedicated to two distinct but convergent issues: the possibility of paraphrase and an account of context sensitivity on the basis of textual cohesion (or coherence). The possibility of explaining contextual specifications of meaning as a side effect of establishing textual cohesion is explored through an investigation into the nature of texts. LÄS MER