Sökning: "stress-corrosion"

Visar resultat 1 - 5 av 12 avhandlingar innehållade ordet stress-corrosion.

  1. 1. 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

  2. 2. Simulation of multipass welding to reduce intergranular stress corrosion cracking

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Erika Hedblom; [2000]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Computer Aided Design; Datorstödd maskinkonstruktion;

    Sammanfattning : This thesis describes the use of the finite element method for simulation of multipass welding. The simulations have been used to find welding procedures that minimises tensile residual stresses on the inside of the studied pipes. This will lead to a reduced risk for Inter Granular Stress Corrosion Cracking. LÄS MER

  3. 3. Hydrolytic degradation of dental composites and effects of silane-treatment and filler fraction on compressive strength and thermal expansion of composites

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Karl-Johan M. Söderholm; Umeå universitet.; [1984]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Internal frictional theory; filler-matrix debonding; stress-corrosion; stressinfluenced diffusion; m icro-crack form ation; crazing; opacity; wear; osmotic pressure; hoop stresses;

    Sammanfattning : Some researchers have suggested that the weakest link of dental composites is the filler-matrix bond. However, due to incompleteness of information dealing with this bond and its stability in a humid environment, it was considered desirable to investigate the effect of water on this region, as well as the influence of filler bonding and filler fraction on compressive strength and thermal expansionExperimental composites containing different filler fractions of either silane-treated or untreated fillers were made. LÄS MER

  4. 4. On the low primary water stress corrosion cracking susceptibility of weld deformed Alloy 690

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Rickard Shen; KTH.; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Solid Mechanics; Hållfasthetslära; Materials Science and Engineering; Teknisk materialvetenskap;

    Sammanfattning : It has been shown in recent years that the nickel-base Alloy 690 can become susceptible to stress corrosion cracking (SCC) in the primary water of nuclear power plants with pressurized water reactors if it has been sufficiently deformed at room temperature. Although the material is not intentionally used in a deformed state, it can become deformed by various manufacturing processes. LÄS MER

  5. 5. Surface integrity and corrosion behavior of stainless steels after grinding operations

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Nian Zhou; KTH.; Högskolan Dalarna.; [2018]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; stainless steel; stress corrosion cracking; surface integrity; grinding; residual stress; Steel Forming and Surface Engineering; Stålformning och ytteknik;

    Sammanfattning : Stainless steels are widely used in applications where both the mechanical properties of steels and high corrosion resistance are required. There is continuous research to enable stainless steel components to be produced in a more economical way and be used in more harsh environments. LÄS MER