Sökning: "disc test"

Visar resultat 1 - 5 av 74 avhandlingar innehållade orden disc test.

  1. 1. A study of airborne wear particles from automotive disc brakes

    Författare :Jens Wahlström; Ulf Olofsson; Werner Österle; KTH; []
    Nyckelord :Disc brakes; Airborne wear particles; Nanoparticles; Cellular automaton; Mechanical engineering; Maskinteknik;

    Sammanfattning : During braking, both the disc and pads in disc brakes are worn. Since disc brakes are not sealed,some of the wear particles generated can become airborne. LÄS MER

  3. 2. Outcome Assessment in Lumbar Spine Surgery

    Författare :Gustavo Zanoli; Lund Ortopedi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; traumatologi; Surgery; Skeleton; muscle system; rheumatology locomotion; Skelett; muskelsystem; reumatologi; Spinal stenosis; Disc; Questionnaire; Outcome assessment; Lumbar spine; Kirurgi; traumatology; orthopaedics; ortopedi;

    Sammanfattning : No consensus regarding outcomes assessment in spine patients exists. Health-Related Quality of Life (HRQoL) questionnaires are increasingly used. The objective of this thesis was the evaluation of HRQoL measures before and after lumbar spine surgery, and their relation to other evaluation parameters as well as relevance of differences. LÄS MER

  4. 3. Towards a simulation methodology for prediction of airborne wear particles from disc brakes

    Författare :Jens Wahlström; Ulf Olofsson; Jens Wahlström; KTH; []
    Nyckelord :Disc brakes; Airborne wear particles; Particle coefficient; Friction; Mechanical engineering; Maskinteknik;

    Sammanfattning : During braking, both the rotor and the pads in disc brakes are worn. Since disc brakes are not sealed, some of the wear particles generated can become airborne. LÄS MER

  5. 4. Tribological nature of squealing disc brakes

    Författare :Filip Bergman; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Materialvetenskap; Materials science; Teknisk materialvetenskap; materialvetenskap; Materials Science;

    Sammanfattning : In the stiff competition between car manufacturers, silent and vibration free brakes hasbecome increasingly important. The aim of the present work is to increase the knowledge of the fundamental friction mechanisms operating in brake systems and to study the parameters influencing disc brake squeal generation. LÄS MER

  7. 5. Mechanical Behaviour of Gas Turbine Coatings

    Författare :Mats Eskner; KTH; []
    Nyckelord :thermal barrier coatings; TBC; small punch test; miniaturised disc bending test; mdbt; spherical indentation; gas turbine coatings; NiAl; NiCoCrAlY; NiCrAlY; mechanical properties;

    Sammanfattning : Coatings are frequently applied on gas turbine components inorder to restrict surface degradation such as corrosion andoxidation of the structural material or to thermally insulatethe structural material against the hot environment, therebyincreasing the efficiency of the turbine. However, in order toobtain accurate lifetime expectancies and performance of thecoatings system it is necessary to have a reliableunderstanding of the mechanical properties and failuremechanisms of the coatings. LÄS MER