Essays about: "deformation gradient"

Showing result 1 - 5 of 10 essays containing the words deformation gradient.

  1. 1. Numerical study of the effect of thermal ice loads on concrete dams

    University essay from KTH/Betongbyggnad; KTH/Betongbyggnad

    Author : Imal Zuwak; Wasseem Kordoghly; [2020]
    Keywords : Arch dam; Buttress dam; Concrete; Finite element analysis; Ice load; Valvdamm; Lamelldamm; Betong; Finit elementanalys; Islast;

    Abstract : It is essential to understand the mechanics of ice load and how it affects concrete dams located in a cold climate, such as Sweden, where the temperature becomes sufficiently cold to freeze the surface of the reservoir. The purpose of this thesis is to study ice load distribution along concrete dams, and its response during the application of an ice load. READ MORE

  2. 2. A method for extracting delamination zones and deformation quantities of paperboard during folding

    University essay from Lunds universitet/Matematik LTH

    Author : Shan Langlais; [2019]
    Keywords : liquid paperboard package; continuum mechanics; optical flow; deformation gradient; strain; delamination; folding; image analysis; Mathematics and Statistics;

    Abstract : Denna studie har genomförts på Tetra Pak för att studera deformation i vätskekartong under vikning. När en förpackning formas i fyllmaskinerna viks kartongen enligt biglinjerna. Det finns ett stort intresse av att studera vikprocessen då den är avgörande för den slutgiltiga kvaliteten av förpackningen. READ MORE

  3. 3. Effects of Lattice Strain in Silicon Double Crystal Monochromators

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/MAX IV-laboratoriet

    Author : Johan Eckdahl; [2018]
    Keywords : synchrotron radiation physics max iv maxiv monochromator monochromation; Physics and Astronomy;

    Abstract : Silicon double crystal monochromators are standard in modern synchrotron hard X-ray beamlines. Their role is reducing a polychromatic photon beam to a small range of wavelengths, typically within a bandwidth of 0.01-0.1%. READ MORE

  4. 4. Thermoplasticity in topology optimization based on finite strain

    University essay from Lunds universitet/Hållfasthetslära

    Author : Anders Engström; [2017]
    Keywords : FEM; topology optimization; finite deformations; thermoplasticity; Technology and Engineering;

    Abstract : A thermoplastic finite strain model is used to model heat generation due to plastic work. Isotropic hardening is used, where the mechanical dissipation acts as heat source in the heat equation. The multiplicative split of the deformation gradient makes it possible to separate plastic and elastic effects. READ MORE

  5. 5. Finite element analysis of cracking of concrete arch dams due to seasonal temperature variation

    University essay from Lunds universitet/Byggnadsmekanik; Lunds universitet/Institutionen för byggvetenskaper

    Author : Fredrik Pettersson; Fredrik Hjalmarsson; [2017]
    Keywords : arch dam; hydro power; finite element method; abaqus; temperature variations; concrete; deformation; crack propagation; Technology and Engineering;

    Abstract : Flera dammkonstruktioner i Norden utsätts för stora temperaturvariationer mellan sommar och vinter. I norra Sverige kan dammar vara utsatta för temperaturvariationer på upp emot 60–70 °C. Detta resulterar ofta i sprickbildning i betongen vilket medför utmaningar vid både utformning av nya dammar och underhåll av befintliga. READ MORE