Sökning: "Höghållfast stål"

Visar resultat 1 - 5 av 26 uppsatser innehållade orden Höghållfast stål.

  1. 1. Analysis of a Plate of High Strength Steel: Simulation of Impact and Determination of Residual Stresses

    Master-uppsats, KTH/Hållfasthetslära

    Författare :Martin Hviid; [2021]
    Nyckelord :;

    Sammanfattning : In this study a finite element model has been created in ABAQUS/Standard in order to replicate impact tests performed by SSAB and to determine residual stresses in a plate. Uniaxial tensile tests have been done in order to determine the plastic behaviour of a high strength steel from the manufacturer SSAB and to determine whether the material can be assumed to be isotropic. LÄS MER

  3. 2. Life and fracture in very high cycle fatigue of a high strength steel

    Master-uppsats, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Författare :Daniel Karlsson; [2021]
    Nyckelord :Very high cycle fatigue; VHCF; Fractography; Fine granular area; FGA; High strength tool steel; Ultrasonic testing equipment;

    Sammanfattning : Classical fatigue models teach that there is an intrinsic fatigue limit for steels, representing a level of stress that is too low for regular crack growth where every cyclic load propagates a fatigue crack through the material. Modern application with extreme lifetimes has shown that fatigue will still take place in steels with stress levels well below the expected fatigue limit. LÄS MER

  4. 3. Economic and technic aspects on post-weld treatment of welded structures exposed to fatigue loads

    Master-uppsats, KTH/Industriell produktion

    Författare :Johan Ankre; [2021]
    Nyckelord :;

    Sammanfattning : It has been known for a long time that we live on a planet with a limited stock of resources. The world population is increasing, more products are being produced and humans are consuming more in a lifetime than the planet can recover. It is a constant competition between industries to keep their prices down and get consumers to buy their product. LÄS MER

  5. 4. Materialoptimering av Kranbom och Framtagning av Provstav : Ett undersökande arbete mot högcykelutmattning av kallformade ståldetaljer

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Jonathan Jansson; [2020]
    Nyckelord :Fatigue; High cycle fatigue; Crane optimazation; Cold-formed steel profiles; Cold-formed steel; Utmattning; Högcykelutmattning; Kranoptimering; Kallformade stålprofiler; Kallformat stål;

    Sammanfattning : Utmattning av stålmaterial är ett fenomen som varit känt i närmare 190 år men trots det är det fortfarande långt ifrån helt utforskat. Utmattningsegenskaper hos grundmaterial och svetsar är idag relativt utforskat, medan områden som utmattningsegenskaper hos kallformade stålprofiler fortfarande mer eller mindre är outforskat. LÄS MER

  7. 5. A literature study on measurement methods for calculating the FeO activity in slag

    Kandidat-uppsats, KTH/Materialvetenskap

    Författare :Rebecca Rosén; [2020]
    Nyckelord :;

    Sammanfattning : During the time we live in, climate change is more important than ever. HYBRIT, formed bySSAB, LKAB, and Vattenfall, is an initiative set out to make the steel production fossil free, by developing a novel process that produce direct reduced iron (DRI) using hydrogen as reagent. Electric arc furnaces (EAF) will then be employed to melt the DRI. LÄS MER