Sökning: "sprickpropagering"

Visar resultat 1 - 5 av 11 uppsatser innehållade ordet sprickpropagering.

  1. 1. Micro-CT based finite element models for mechanical strength assessment of glass ceramic scaffolds obtained through the robocasting technique

    Master-uppsats, KTH/Hållfasthetslära

    Författare :Gustav Thessén; [2022]
    Nyckelord :µ-CT modelling; phase-field method; bio-glass scaffolds; strength assessment; Mikrotomografi; μ-CT; fasfältsmetoden; bio-glas stödstrukturer; brottgräns;

    Sammanfattning : In this thesis, micro computed tomography (μ−CT) scans of a bio-glass scaffold produced by the robocasting technique was used to create finite element method (FEM) models with the purpose of determining its mechanical strength. Prior to this, a Matlab script was used to create several simplified geometries of the scaffold in an effort to determine the importance of scaffold design parameters (such as the fiber compenetration between two adjacent printing planes) on the strength of the scaffold. LÄS MER

  3. 2. Sensors for intelligent and reliable components

    Magister-uppsats, KTH/Skolan för industriell teknik och management (ITM)

    Författare :Pontus Lundman; [2020]
    Nyckelord :Wind turbine; Gearbox; Sensor; Condition monitoring; Cyber-physical system; Vindkraftverk; Växellåda; Sensor; Tillståndsövervakning; Cyberfysiskt system;

    Sammanfattning : One way to tackle the climate change society is facing today is through the change to renewable energy sources, such as wind power. Today, a trend when it comes to technology is that products are evolving into becoming more cyber-physical systems (CPS) by integrating functions realized with mechanics, control and communication. LÄS MER

  4. 3. 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

  5. 4. Crack propagation calculations in non-elastic metals

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Material- och solidmekanik

    Författare :Máren Ingá Baer; [2018]
    Nyckelord :crack propagation; fracture mechanics;

    Sammanfattning : It is important to know the lifespan of a component, thus services can be planed. At Siemens Industrial Turbomachinery AB (SIT AB) develop and produce gas and steam turbines, the turbines are heavily strained by thermal and centrifugal forces during their life span which lead to cracking. LÄS MER

  7. 5. A digital image correlation method for detection of fatigue cracks in non-load carrying T-joints

    Master-uppsats, KTH/Lättkonstruktioner

    Författare :Björn Jonsson; [2018]
    Nyckelord :;

    Sammanfattning : In dynamical loaded welded structures fatigue life is often a limiting factor. Common practise is to reduce nominal stress by increased material thickness which leads to oversized, heavy structures. Those practises are replaced by improvement of production and designingtechniques to utilize better properties of high strength steels. LÄS MER