Sökning: "maximum surface stress"

Visar resultat 21 - 25 av 28 uppsatser innehållade orden maximum surface stress.

  1. 21. Dynamic Line Rating - Thermal Line Model and Control

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Industriell elektroteknik och automation

    Författare :Martin Andersson Ljus; [2013]
    Nyckelord :Technology and Engineering;

    Sammanfattning : In times of increased environmental awareness, there exists a desire to not only build new environmentally friendly and renewable power generating units, but also to increase the efficiency of all existing technology. Wind power is such a renewable and environmentally friendly technology. LÄS MER

  3. 22. Dynamic Line Rating - Thermal Line Model and Control

    Master-uppsats, Lunds universitet/Industriell elektroteknik och automation

    Författare :Martin Andersson Ljus; [2013]
    Nyckelord :Dynamic Line Rating; Overhead Line; Offshore Wind Farm; Thermal Line Model; PID regulator; Temperature Control; Heat Balance in an Overhead Line; Öland; Kårehamn; Conductor Surface Temperature; Wind Farm Output Reference Value; Technology and Engineering;

    Sammanfattning : In times of increased environmental awareness, there exists a desire to not only build new environmentally friendly and renewable power generating units, but also to increase the efficiency of all existing technology. Wind power is such a renewable and environmentally friendly technology. LÄS MER

  4. 23. Multiscale mechanics and physics of nature’s dry adhesion systems

    Master-uppsats, Mekanik; Tekniska högskolan

    Författare :Nils Karlsson; [2012]
    Nyckelord :dry adhesion; detachment; thermal fluctuations; interaction potential; FEM;

    Sammanfattning : Dry adhesion systems adhere via physical bonds without any significant contribution from a liquid medium. In nature, these systems are found among the footpads of spiders, lizards and many other small animals, with high adhesion force, low detachment force and elfcleaning properties. LÄS MER

  5. 24. Analys och dimensionering av sintrade kugghjul

    Kandidat-uppsats, KTH/Maskinkonstruktion (Inst.)

    Författare :Sara Blomqvist; Henrik Litz; Johan Salomon; [2012]
    Nyckelord :;

    Sammanfattning : Syftet med detta projekt var att genom konceptutveckling ta tillvara sinterteknikens fördelar vid konstruktion av kugghjul med inriktning på dess mekaniska egenskaper. Målet har varit att ta fram koncept där kugghjulet blir lättare men med bibehållen hållfasthet gentemot referenskugghjulet samt att möjlighet till asymmetriska kuggflankerna utnyttjas för att minimera det sintrade materialets känslighet för dragspänningar vid höjd belastning. LÄS MER

  7. 25. Hybrid Joining of Aluminum to Thermoplastics with Friction Stir Welding

    Master-uppsats, KTH/Materialvetenskap

    Författare :Wallop Ratanathavorn; [2012]
    Nyckelord :friction stir welding; hybrid welding;

    Sammanfattning : Hybrid structures including aluminum-thermoplastic and aluminum-reinforced thermoplastic composite are increasingly important in the near future innovations due to its lightweight and high strength-to-weight ratio. A critical point for metal-polymer application is that sound joining of these materials is difficult to achieve owing to a large difference in surface energy and dissimilar structure between metal and polymer. LÄS MER