Sökning: "Equivalent fatigue"

Visar resultat 6 - 10 av 23 avhandlingar innehållade orden Equivalent fatigue.

  1. 6. Squat defects and rolling contact fatigue clusters - Numerical investigations of rail and wheel deterioration mechanisms

    Författare :Robin Andersson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; rail surface irregularities; rolling contact fatigue clusters; dynamic vehicle–track interaction; rolling contact fatigue; studs; squats; fracture mechanics;

    Sammanfattning : Squat defects, a type of localised rolling contact fatigue damage appearing on rail surfaces with rail break as an ultimate consequence, have concerned infrastructure managers for the last couple of decades. In recent years similar types of defects—so-called studs—that are visually resembling squats, have started to appear. LÄS MER

  3. 7. Transverse cracking in cross-ply composites during static and fatigue loading at different temperatures

    Författare :Vivek Richards Pakkam Gabriel; Patrik Fernberg; Mohamed Sahbi Loukil; Kristofer Gamstedt; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polymer composite laminate; Static loading; Fatigue loading; Elevated temperature effect; Weibull distribution model; Polymeric Composite Materials; Polymera kompositmaterial;

    Sammanfattning : Polymer composite laminates are preferred in many load bearing applications for its tailorable mechanical properties while offering light-weight solution, corrosive resistance etc. Hence, polymer composites are attractive material choice for aircraft manufacturers to reduce weight and emissions. LÄS MER

  4. 8. Reliability and applications of adhesives for microsystem packaging

    Författare :Zhimin Mo; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrically Conductive Adhesives; Finite Element Modeling; Reliability; Stress Analysis; Low Cycle Fatigue; Thermomechanical Fatigue; Encapsulation; Interconnection;

    Sammanfattning : The electronics industry is one of the most dynamic, fascinating and important industries. Polymeric adhesives are widely used in electronics packaging and play a critical role. LÄS MER

  5. 9. On fatigue crack growth modelling of surface initiated rolling contact fatigue using the asperity point load mechanism

    Författare :Dave Hannes; Bo Alfredsson; Sylvie Pommier; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Load transfer in applications or between machine components is generally achieved through contact. In case of recurrent high contact loads in combination with a rolling motion, i.e. with a relatively small amount of slip, the contact surface may eventually suffer from rolling contact fatigue (RCF). LÄS MER

  7. 10. Shedding light on cognitive control

    Författare :Simon Skau; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cognitive Control; fNIRS; mental fatigue; exhaustion disorder; TBI; children; mathematical cognition; proactive cognitive control;

    Sammanfattning : This thesis aimed to investigate the ability to adjust cognitive processes and behavior, i.e., cognitive control, and its related functional activity in the cortex. LÄS MER