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Visar resultat 6 - 10 av 32 avhandlingar som matchar ovanstående sökkriterier.

1. 6. Computational Homogenization of Transient Problems - Application to Porous Media

   Författare :Fang Su; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; consolidation; Representative Volume Element RVE ; homogenization; FE2;

   Sammanfattning : This thesis is devoted to the development and analysis of a homogenization-basedcomputational strategy for simulating the transient and nonlinear coupled consolidationproblem in micro-heterogeneous porous media. A variational framework and the pertinentfinite element (FE) strategy, based on a generalized macro-homogeneity condition,are proposed for the spatial homogenization of a class of transient problems, wherebythe classical assumption of first order homogenization is adopted. LÄS MER

3. 7. On computational homogenization of transient poromechanics problems

   Författare :Fang Su; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; homogenization; porous media; Representative Volume Element RVE ; consolidation; FE2; multiscale modeling;

   Sammanfattning : Many engineering materials are, in fact, microscopically heterogeneous. This is true fornatural materials, such as timber and clay, as well as manmade materials, like metal alloysand concrete. LÄS MER

4. 8. Mechanical behavior of Lithium-ion battery electrodes – experimental and statistical finite element analyses

   Författare :İbrahim Buğra Üçel; Peter Gudmundson; Ralf Jänicke; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Li-ion batteries; mechanical testing; statistics; finite elements; electrodes; Solid Mechanics; Hållfasthetslära;

   Sammanfattning : The applications of Li-ion batteries in the electronics and vehicle industry is increasing at a very rapid pace. This is primarily due to superior properties such as high specific energy storage and power as well as wider operation temperature ranges. LÄS MER

5. 9. Modelling microstructure evolution of weld deposited Ti-6Al-4V

   Författare :Corinne Charles; Högskolan Väst; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; metal deposition; Ti-6Al-4V; microstructure modelling; titanium alloy; Finite Element Method; Johnson-Mehl-Avrami; RTMwD; Materials science; Teknisk materialvetenskap; Manufacturing and materials engineering; Produktions- och materialteknik; Material Mechanics;

   Sammanfattning : The microstructure and consequently the mechanical properties of titanium alloys are highly dependent on the temperature history endured by the material. The manufacturing process of metal deposition induces repetitive cooling and heating in the material determining a specific microstructure. LÄS MER

7. 10. Influence of microstructure on debonding at the fiber/matrix interface in fiber-reinforced polymers under tensile loading

   Författare :Luca Di Stasio; Janis Varna; Zoubir Ayadi; Alberto Barroso; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fiber matrix interface; Debonding; Polymer-Matrix Composites PMC ; Finite Element Method FEM ; Linear Elastic Fracture Mechanics LEFM ; Polymeric Composite Materials; Polymera kompositmaterial;

   Sammanfattning : At the end of the second decade of the XXI century, the transportation industry at large faces several challenges that will shape its evolution in the next decade and beyond. The first such challenge is the increasing public awareness and governmental action on climate change, which are increasing the pressure on the industrial sectors responsible for the greatest share of emissions, the transportation industry being one of them, to reduce their environmental footprint. LÄS MER