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Visar resultat 1 - 5 av 136 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Hygro-Mechanics of Wood Fibre Composite Materials

   Författare :Kristian Stålne; Byggnadsmekanik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; homogenisation; Wood composite materials; modelling; stiffness; hygroexpansion; creep; mechanosorption;

   Sammanfattning : The work presented in this thesis deals with modelling and testing of hygro-mechanical properties of wood fibre composite materials. The material studied experimentally is high pressure laminate, HPL, which is a wood fibre network composite, made up of craft paper impregnated with phenolic or melamine resin. LÄS MER

3. 2. Modelling Stiffness and Damping by Use of Fractional Calculus with Application to Railpads

   Författare :Åsa Fenander; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; stiffness; initial conditions; modal synthesis; time integration; measurements; fractional calculus; railway tracks; fractional integrals; damping; railpads; structural dynamics; fractional derivatives; mathematical models;

   Sammanfattning : When studying the dynamic behaviour of a structure, e g a railway track, it is important for the analyst to model both stiffness and damping accurately. Mathematical models including fractional derivatives have been found to work well for many materials. Such models are linear and causal. LÄS MER

4. 3. Micromechanical Modelling of Wood and Fibre Properties

   Författare :Kent Persson; Byggnadsmekanik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Environmental technology; Byggnadsteknik; Building construction; Microfibril angle; Density; Hygroexpansion; Stiffness; Simulation; Wood; Fibre; pollution control; Miljöteknik; kontroll av utsläpp; Material technology; Materiallära; materialteknik;

   Sammanfattning : Wood is a material with mechanical properties that vary markedly, both within a tree and among trees. Moisture changes lead to shrinkage or swelling and modify the mechanical properties. LÄS MER

5. 4. Highly-filled biocomposites: modelling, processing, and characterization

   Författare :Sajjad Pashazadehgaznagh; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; modelling; fiber orientation; rheology.; Wood plastic composites WPCs ; extrusion; surface instability;

   Sammanfattning : The use of polymer with natural fiber reinforcements is expected to increase significantly. This can be noted in several industrial sectors of strategic importance for Sweden, such as automotive, packaging, construction, and furniture industries. LÄS MER

7. 5. Strukturmekanik & arkitektur Om strukturmekanisk förståelse i gestaltningsprocessen

   Författare :Karl-Gunnar Olsson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CALFEM; stiffness; structural mechanics; design; architecture; Architectural design process; pointSketch; ForcePAD; canonical stiffness; static eigenvalues;

   Sammanfattning : Organizing material to produce space and a load-carrying structure are central tasks in the architectural design process. In trying out and examining design ideas, use of language and tools appropriate to the purpose is fundamental. LÄS MER