Sökning: "kontaktmekanik"

Visar resultat 1 - 5 av 7 uppsatser innehållade ordet kontaktmekanik.

  1. 1. Additives in a steam engine to decrease friction : Friction testing of solid lubricants in powder form

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

    Författare :Viktor Lange; [2023]
    Nyckelord :Tribology; friction; wear; steam; steam engine; ranotor; invencon; invencon AB; steel; contact mechanics; hexagonal boron nitride; molybdenum disulfide; tungsten disulfide; lubricants; solid lubricants; Tribologi; friktion; nötning; ånga; ångmotor; stål; kontaktmekanik; smörjning; smörjmedel; fasta smörjmedel;

    Sammanfattning : This thesis aims to investigate the coefficient of friction between steel on steel contacts with the addition of solid lubricants such as h-BN, WS2, MoS2 in powder form, in dry conditions and wet conditions. More specifically, the purpose is to enhance the sliding between the piston rings and cylinder block in a modern high temperature steam engine developed by RANOTOR. LÄS MER

  3. 2. Modeling of a ball contact with a coated plate

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

    Författare :Mohammadreza Saeedi; [2023]
    Nyckelord :Pin on disc tribometer; coating; contact mechanics; finite element method; tribology; Pin on disc tribometer; beläggning; kontaktmekanik; finita elementmetod; tribologi;

    Sammanfattning : During tightening of a screw, the variation in friction will affect the force acting on the joint, especially when tightening using torque as a control parameter. So, it is crucial to have a proper understanding of the contact mechanism and friction in the screw head to joint and thread interfaces. LÄS MER

  4. 3. Investigate the track gauge widening on the Iron-ore line and suggest maintenance limits

    Master-uppsats, KTH/Spårfordon

    Författare :Jesper Flodin; [2020]
    Nyckelord :;

    Sammanfattning : Iron ore export remains a major player in the Swedish economy to date, with 90% of all iron ore produced in Europe stemming from the relatively small northern country. A large amount of this ore is transported from the mines to harbours for world-wide freight on railways. LÄS MER

  5. 4. Design and Development of a Micropitting Test Rig

    Master-uppsats, KTH/Maskinkonstruktion (Inst.)

    Författare :Feng Gao; [2015]
    Nyckelord :micropitting; test rig; design; development; mikropitting; provningsrigg; konstruktion; utveckling;

    Sammanfattning : One of the common failure modes in rolling contacts, such as in gears and rolling element bearings, is micropitting which has become a big issue. It is considered as a fatigue indicator and can lead to premature gear and bearing failure. LÄS MER

  7. 5. Litteraturstudie, modellering och simulering av kugginteraktioner i planetväxlar

    Kandidat-uppsats, Linnéuniversitetet/Institutionen för maskinteknik (MT)

    Författare :Henrik Alm Grundström; [2015]
    Nyckelord :Kugghjul; planetväxlar; verkningsgrad; finita elmentmetoden; kontaktmekanik; tandmodifikationer; utväxling; simulering; MSC ADAMS; MSC MARC; vridstyvhet; planetfasning; transmissionsfel;

    Sammanfattning : Detta arbete sammanfattar en del av den forskning som gjorts på kugghjul och planetväxlar med avseende på egenskaper som lastfördelning, verkningsgrad och ingreppsstyvheter. En jämförelse görs mellan olika metoder för beräkning av ingreppsstyvheter vilken visar på stora skillnader. LÄS MER