Sökning: "Solid Mechanics"

Visar resultat 1 - 5 av 296 avhandlingar innehållade orden Solid Mechanics.

  1. 1. Multiscale modeling of dynamic recrystallization

    Detta är en avhandling från Avd för Hållfasthetslära, Box 118, 221 00 Lund

    Författare :Ylva Mellbin; Lunds universitet.; Lund University.; [2016-09-16]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Dynamic recrystallization; Crystal plasticity; Texture; Grain size strengthening; Vertex model; Nucleation; Particle pinning; Large deformations; Multiscale modeling; GPGPU;

    Sammanfattning : During thermomechanical processing of metals, changes occur in the microstructure of the material which affect its macroscopic properties. By understanding these transformations in the microstructure, it becomes possible to design the processes in a way which yields the desired properties in the finished product. LÄS MER

  2. 2. Modelling Damage Evolution and Fracture of Paper Materials

    Detta är en avhandling från Division of Solid Mechanics

    Författare :Rickard Hägglund; Lunds universitet.; Lund University.; [2009]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Paper material; Fracture mechanics; Tensile strength; Fibre network; Continuum damage mechanics; Non-local theory;

    Sammanfattning : This thesis contains six papers dealing with different aspects of damage and fracture in paper. The work addresses the problem of material length scales in the context of deformation and fracture of paper materials. LÄS MER

  3. 3. Strain-assisted corrosion cracking and growth rate inhibitors

    Detta är en avhandling från Andrey Jivkov, Solid Mechanics, Malmö University, SE-205 06 Malmö, Sweden

    Författare :Andrey P Jivkov; Lunds universitet.; Lund University.; [2002]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vacuum technology; vibration and acoustic engineering; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik; materialteknik; Mechanical engineering; Material technology; Materiallära; Stress intensity factor; Inhomogeneous materials; Crack evolution; Stress corrosion cracking; Moving boundary; hydraulics;

    Sammanfattning : A model for evolution of cracks as a result of strain-assisted corrosion is presented. The considered cracks possess a realistic geometry, where the tip region is an integral part of the crack surface instead of being a singular point. This geometry is either implicitly defined or is a consequence of crack nucleation from surface irregularities. LÄS MER

  4. 4. On initiation of chemically assisted crack growth and crack propagation paths of branching cracks in polycarbonate

    Detta är en avhandling från Ulf Hejman/Media-Tryck AB

    Författare :Ulf Hejman; Lunds universitet.; Lund University.; Malmö University.; [2010]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; stress corrosion; crack initiation; multiple cracking; polycarbonate; three point bending; branching.; MATHEMATICS Applied mathematics Numerical analysis; MATEMATIK Tillämpad matematik Numerisk analys; TECHNOLOGY Engineering mechanics Solid mechanics; TEKNIKVETENSKAP Teknisk mekanik Fastkroppsmekanik; TECHNOLOGY Materials science Surface engineering; TEKNIKVETENSKAP Teknisk materialvetenskap Ytbehandlingsteknik; Sciences; stress corrosion cracking; dissolution; branching; experiment; finite element modelling;

    Sammanfattning : Stress corrosion, SC, in some cases gives rise to stress corrosion cracking, SCC, which differs from purely stress intensity driven cracks in many aspects. They initiate and grow under the influence of an aggressive environment in a stressed substrate. They grow at low load and may branch. LÄS MER

  5. 5. Concepts for hot sheet metal forming of titanium alloys

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Eva-Lis Odenberger; Luleå tekniska universitet.; [2009]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hot sheet metal forming; Titanium; FE simulation; Validation; Springback; HCP; Engineering mechanics - Solid mechanics; Varmforming; Titan; FE simulering; Validering; Återfjädring; HCP; Teknisk mekanik - Fastkroppsmekanik; Hållfasthetslära; Solid Mechanics;

    Sammanfattning : To increase the competitiveness of the Swedish aero engine industry alternative manufacturing methods for load carrying aero engine structures are desired, in order to reduce product cost and enable weight reduction and thereby fuel consumption. Traditionally, these structures mainly consist of large-scaled single castings of e.g. LÄS MER