Mechanical Engineering - Fatigue Failure and Design Quiz
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Questions and Answers

What type of stress changes constantly in dynamic loads?

  • Bending stress
  • Compression stress
  • Tensile stress
  • Dynamic stress (correct)
  • Which test provides useful values for material selection and component dimensioning for statically loaded components?

  • Compression test
  • Cyclic stress test
  • Tensile test (correct)
  • Fatigue test
  • What type of stress can be both cyclic or random in dynamic loads?

  • Tensile stress
  • Compression stress
  • Bending stress
  • Dynamic stress (correct)
  • What type of failure may occur when components are subjected to dynamic loads?

    <p>Fatigue failure</p> Signup and view all the answers

    What is the term used for the applied load on the material in service application not causing permanent deformation?

    <p>Elastic deformation</p> Signup and view all the answers

    Which factor affects fatigue properties of materials?

    <p>Dynamic loads</p> Signup and view all the answers

    What is the phenomenon known as when a material fails due to repeated loading and unloading, even at low loads?

    <p>Fatigue failure</p> Signup and view all the answers

    Which type of stress cycle involves stress alternating from a maximum tensile stress to a minimum compressive stress of equal magnitude?

    <p>Reversed stress cycle</p> Signup and view all the answers

    What type of stresses are necessary for fatigue failure to occur?

    <p>Both tensile and compressive stresses</p> Signup and view all the answers

    In which type of load is the strength limit lower compared to static load?

    <p>Dynamic load</p> Signup and view all the answers

    What is the nature of fatigue failure in normally ductile metals?

    <p>Brittle</p> Signup and view all the answers

    What type of components or structures commonly experience fatigue failure?

    <p>Aircraft and machine components</p> Signup and view all the answers

    What occurs by the initiation and propagation of cracks in fatigue failure?

    <p>Material fracture</p> Signup and view all the answers

    Which type of stress is necessary for fatigue to occur in a material?

    <p>Axial (tension-compression) stress</p> Signup and view all the answers

    What type of fracture surface is typically observed in fatigue failure?

    <p>Perpendicular to the direction of applied tensile stress</p> Signup and view all the answers

    In which type of material fatigue occurs when repetitive stresses are below the yield strength?

    <p>All materials</p> Signup and view all the answers

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