Sökning: "fatigue load models"

Visar resultat 1 - 5 av 26 uppsatser innehållade orden fatigue load models.

  1. 1. Analys av hur spänningen i förspända skruvförband påverkas av belastningar

    M1-uppsats, Högskolan i Gävle/Maskinteknik

    Författare :Emil Gutå; Gustav Rytkönen; [2022]
    Nyckelord :;

    Sammanfattning : This study is a thorough analysis of how the bolt pretension of a clamped mount changes underexternal loads. The analyzed mount is named 3611 in MAFI’s product catalog. The purpose of thisstudy was to ensure that the bolt pretension remains within acceptable values and thereby minimizingthe risk of unexpected failures. LÄS MER

  3. 2. A comparison of pressurised cylinders in HIP systems using CFD and FEM

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

    Författare :Lisa Lindqvist; [2021]
    Nyckelord :Hot isostatic pressing; HIP; Pressure vessel; Monoblock; Axisymmetric; FSI;

    Sammanfattning : A hot isostatic press (HIP) is a system which utilises high temperatures and pressure in order to densifyand enhance the material properties of components in the aerospace, automotive and additive manufacturingindustries, to mention a few. Quintus is a world leading manufacturer of HIP systems, and this master’s thesiswork has been written in collaboration with them. 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. Data-driven Strain Sensor Modelling in Mining Applications : Artificial strain sensors for material fatigue estimation

    Master-uppsats, Linköpings universitet/Fordonssystem

    Författare :Alex Rydén; Mattias Langsér; [2021]
    Nyckelord :Linear models; Machine learning; Ensamble learners; Time series; LTI; System identification; Strain estimation; Material fatigue; Data-driven modelling; Mining;

    Sammanfattning : When boring machines are used, large loads are exerted on their structure. The load cycles cause material fatigue on the boring machine structure. If the material fatigue can be estimated in real-time, maintenance can be planned more efficiently and the effect of different types of usage can be evaluated. LÄS MER

  7. 5. Simulation and Modelling of Injection Molded Components : Fiber Reinforced Polymers in Powertrain Mounts

    Master-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Författare :Hanna Jakobsson; [2020]
    Nyckelord :Material modelling; polymer composites; FRP; orthotropic; powertrain mount; vehicle engineering; Digimat; Material modellering; polymera kompositer; ortotropisk; motorupphängnig; Digimat;

    Sammanfattning : Powertrain mounts' purpose is to mount the engine and the gearbox in the car. Besides that, it isolate the body from the powertrain movements and road excitation. The most common material in powertrain mounts bracket is aluminum but lately, fibre reinforced polymer (FRP) has been acting as a substitute for the aluminum. LÄS MER