Sökning: "friction disc"

Visar resultat 21 - 25 av 41 uppsatser innehållade orden friction disc.

  1. 21. Dynamics of a high-eccentricity planet in a large planetesimal disc

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Martin Schmidt Montelius; [2019]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : Clustering of orbital characteristics for distant Solar System objects has been proposed to indicate the presence of a ninth planet. Simulations show that the planets orbit would have to have a mass of 5–10 Solar masses, a semi-major axis of 400–800 AU, an eccentricity of 0.2–0.5 and an inclination of 15–25°. LÄS MER

  3. 22. Thermomechanical characterisation of newly developed UHMWPE composites

    Master-uppsats, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Petra Jan; [2019]
    Nyckelord :UHMWPE; nanocomposites; thermomechanical characterisation;

    Sammanfattning : Ultra high molecular weight polyethylene (UHMWPE) is a polymer commonly used in various applications, particularly in hip joint replacements. Despite its good performance, it is susceptible to oxidation degradation, which can be mitigated with the addition of vitamin E, and to excessive wear against metal countersurfaces, which can potentially be improved with the addition of nanoparticles. LÄS MER

  4. 23. Friction and wear study of lean powder metallurgy steel in a lubricated sliding contact

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad materialvetenskap

    Författare :Caroline Lejonklo; [2019]
    Nyckelord :Lean steel; Powder metallurgy PM ; Powder metallurgy steel PM steel ; Friction; Wear; Sliding contact; Lubricated; Porosity; Tribology; Adhesive wear; Abrasive wear; Gear; Gear tooth; Particles; Polyalphaolefin 8 PAO 8 ; Contact pressure; Density; Light optical microscopy LOM ; Scanning electron microscopy SEM ; Energy-dispersive X-ray spectroscopy EDS ; Vertical svanning interferometry VSI ; Pin on disc; Pin-on-disc;

    Sammanfattning : A fairly new technology used to produce metallic components is powder metallurgy (PM). Among the advantages with this technique are decreased cost of production for complex-shaped parts, new alloys are made possible, reduced end processing, less material loss, and vibrational damping effects. LÄS MER

  5. 24. Tribological characterisation of turbocharger turbine sealing rings in heavy duty diesel engines

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

    Författare :Alex Goussakov; Alin Dumitru Durac; [2018]
    Nyckelord :Tubine sealing rings;

    Sammanfattning : This work investigated the wear mechanisms of turbocharger components in heavy duty diesel engines. By understanding the wear mechanisms that are occurring in turbochargers the life time of the turbocharger components can be improved. LÄS MER

  7. 25. Metal-on-Polymer Wear for Orthopaedic Hand Prostheses : Metall-på-polymer-slitage för ortopediska handproteser

    Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :CHLOE TECHENS; [2018]
    Nyckelord :orthopaedics prosthesis arthrosis trapezometacarpal biomaterial tribology friction wear;

    Sammanfattning : Metal-on-polymer prostheses in orthopaedics are often subject to high wear level producing large polyethylene particles that the body has difficulties to eliminate. Those debris can lead to prosthesis loosening. LÄS MER