Sökning: "Fatigue failure"

Visar resultat 1 - 5 av 172 avhandlingar innehållade orden Fatigue failure.

  1. 1. Very high cycle fatigue of high performance steels

    Författare :Vitaliy Kazymyrovych; Karlstads universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fatigue; tool steels; ultrasonic testing; fatigue life; crack growth rate; fatigue mechanisms; Materialteknik; Materials Engineering;

    Sammanfattning : Many engineering components reach a finite fatigue life well above 109 load cycles. Some examples of such components are found in airplanes, automobiles or high speed trains. For some materials the fatigue failures have lately been found to occur well after 107 load cycles, namely in the Very High Cycle Fatigue (VHCF) range. LÄS MER

  3. 2. Sensory integration : success & failure

    Författare :Tamas Jantvik; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industriell elektronik; Industrial Electronics;

    Sammanfattning : The convergence of sensory signals plays an important role in perception. Two cases of convergence are examined in this thesis by means of modelling; the case when the converging signals are congruent, which leads to combination and an enhancement of perception, and the case when they are incongruent. LÄS MER

  4. 3. Fatigue in patients with chronic heart failure. Patient experience and consequences of fatigue in daily life

    Författare :Kristin Falk; Göteborgs universitet; []
    Nyckelord :fatigue; chronic heart failure; uncertainty; sense of coherence; anxiety; depression; symptom distress; hemoglobin; functional status;

    Sammanfattning : Although fatigue is a prevalent and distressing symptom in patients with chronic heart failure (CHF), it is an underestimated problem in the care of patients, and consequently, insufficiently investigated. The primary aim of this thesis was, therefore, to advance the knowledge from the patients? perspective by describing characteristics of the fatigue experience and its consequences in daily life in patients with CHF. LÄS MER

  5. 4. Failure of Sandwich Structures with Sub-Interface Damage

    Författare :Andrey Shipsha; KTH; []
    Nyckelord :sandwich structure; foam core; fatigue; crack growth; stress intensity factor; fatigue threshold; fracture toughness; damage tolerance; impact damage; crushed core; bridging; fracture analysis; point-stress criterion;

    Sammanfattning : .... LÄS MER

  7. 5. On the effect of repetitive loading on the spine of young elite athletes. Clinical and experimental studies

    Författare :Olof Thoreson; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; spine; intervertebral disc; athlete; young adult; low back pain; magnetic resonance imaging; porcine; repetitive loading; failure; fatigue;

    Sammanfattning : Introduction: The human spine is exposed to many different loads during daily activities and especially during sporting activities. The spine has different biomechanical properties during the lifetime and thereby responds differently to repetitive and sudden loads. LÄS MER