Sökning: "residual compressive stress"

Visar resultat 1 - 5 av 14 uppsatser innehållade orden residual compressive stress.

  1. 1. Numerical analysis of a bearing strength in delaminated composite joint

    Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

    Författare :Olavi Kukkonen; [2023]
    Nyckelord :Bearing strength; Single-lap shear; Delamination; Countersinking; Hole size;

    Sammanfattning : Composite structures are commonly joined using adhesive or mechanical joints, withmechanical joints being preferred when components need to be removable for maintenancepurposes. However, the presence of mechanical joints introduces a discontinuity in theload path, which can serve as an initiation point for failure and needs to be taken intoaccount in the design of the joint. LÄS MER

  3. 2. Stress-free titanium-based thin films for inner ear microphones : The last missing part of a technology for totally implantable hearing aid implants

    Master-uppsats, Linköpings universitet/Tunnfilmsfysik

    Författare :Dina Ehsan; [2020]
    Nyckelord :Stress-free; thin films; in situ; titanium; compressive; tensile;

    Sammanfattning : An implantable hearing aid device is being developed by a project group which is part of an EU initiative. This device contains a diaphragm consisting of a submicron thick freestanding titanium film, which should be free of internal stresses. LÄS MER

  4. 3. Development of a Method to Measure Residual Stresses in Cast Components with Complex Geometries

    Master-uppsats, KTH/Materialvetenskap

    Författare :Yang Yang; [2020]
    Nyckelord :Residual Stresses; Cast Iron; Engine Components; XRD; Ultrasonic; Cutting;

    Sammanfattning : Cast iron, taking the advantages of the advanced castability forming components of complex geometries and favorable mechanical properties, is employed in engine components in truck industries. Compacted graphite iron (CGI) integrates both merits of lamellar graphite iron (LGI) and spheroidal graphite iron (SGI) such as good machinability and high thermal conductivity from LGI, high ultimate tensile strength (UTS), good fatigue resistance, high elastic modulus, and high ductility from SGI, thus is now becoming a competitive alternative of traditional LGI in cylinder blocks and heads. LÄS MER

  5. 4. Optimization of case-hardening depth for small gears

    Master-uppsats, KTH/Hållfasthetslära (Avd.)

    Författare :Johannes Nyman; [2019]
    Nyckelord :;

    Sammanfattning : The optimization of case hardening depth for small gears was investigated with the use of Abaqus and the subroutine DANTE to simulate the formation of the microstructural phases, resulting in residual stresses and increased hardness. This was done with a step wise increment of the carburizing time, resulting in a theoretical maximum for compressive residual stresses at the surface. LÄS MER

  7. 5. Spricktillväxt i stålkonstruktioner på grund av utmattning

    Kandidat-uppsats, KTH/Byggteknik och design

    Författare :Kemal Abdelwahab; Abdirizag Farah Mohamed; [2019]
    Nyckelord :Steel Bridge; Fatigue; Stress Intensity Factors; Abaqus; Crack Propagation; Nominal Stresses; Stålbroar; Utmattning; Spänningsintensitetsfaktor; Abaqus; Sprickpropagering; Nominella spänningar;

    Sammanfattning : Stålbroars approximativa livslängd bestäms av stålets utmattningshållfasthet, då utmattning är en av de främsta anledningarna till att livslängden begränsas. I Sverige existerar ett antal broar som närmar sig slutet av sin livslängd, samtidigt som behovet för kapacitet och kraven på broarna ökar. LÄS MER