Sökning: "low cycle fatigue"

Visar resultat 1 - 5 av 22 uppsatser innehållade orden low cycle fatigue.

  1. 1. Fatigue properties of Laser Powder Bed Fusion (LPBF) built 21-6-9 stainless stee

    Master-uppsats, Högskolan Väst/Avdelningen för avverkande och additativa tillverkningsprocesser (AAT)

    Författare :Jayanth Krishna; [2021]
    Nyckelord :stainless steels; LPBF; Fatigue; 21-6-9;

    Sammanfattning : Fatigue performance is one of the important mechanical properties which is hindering some of the additive manufacturing build structures. The main objective of this study is to investigate the fatigue life dependence of the 21-6-9 austenitic stainless-steel build using the laser powder bed fusion (LPBF) technique. LÄS MER

  3. 2. Akustisk emission vid skärande bearbetning från den adhesiva mekanismen som funktion av förslitningsutvecklingen

    M1-uppsats, Högskolan i Gävle/Avdelningen för industriell ekonomi, industridesign och maskinteknik

    Författare :Johan Lundell; [2021]
    Nyckelord :Adhesion; Stagnation; Skärande bearbetning; Abrasion; Verktygsförslitning; Ljudmätning; Frekvens; Amplitud;

    Sammanfattning : The adhesive mechanism is one of the most significant degradation processes of the edge in metal cutting. Although knowledge about adhesion and edge buildup (BUE) has increased in recent years, there are still areas that are less explored. LÄS MER

  4. 3. 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

  5. 4. Modelling, Evaluation and Assessment of Welded Joints Subjected to Fatigue

    Master-uppsats, Linköpings universitet/Mekanik och hållfasthetslära

    Författare :Prajeet Rajaganesan; [2020]
    Nyckelord :Welded joints; Fatigue Assessments; Hot Spot method; Python Automation; Post-processing; Abaqus;

    Sammanfattning : Fatigue assessment of welded joints using finite element methods is becoming very common. Research about new methods is being carried out every day that show a more accurate estimation of the fatigue life cycle than the previous ones. LÄS MER

  7. 5. Planetary Gear Analysis : deformation induced misalignment and optimization

    Master-uppsats, KTH/Maskinkonstruktion (Inst.)

    Författare :Martin Jonsson; [2020]
    Nyckelord :FEM; gears; KISSsoft; misalignment; planetary gears; FEM; KISSsoft; kugghjul; planetväxlar; vinkelfel;

    Sammanfattning : A handheld heavy-duty nut runner, commonly used to assemble windmills and oil pipe lines, and capable of producing 4100 Nm of torque, experiences low cycle fatigue and usually fails after 20 000 cycles at the specified torque. A full assembly Finite element model of the last stage of the four-stage planetary gearbox is constructed and simulated over one complete load cycle. LÄS MER