Fatigue Test in Mechanical Engineering
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Questions and Answers

What is fatigue in structures?

  • A type of failure that occurs under repeatedly applied loads (correct)
  • A type of failure that occurs under tensile loads
  • A type of failure that occurs under compressive loads
  • A type of failure that occurs under static loads

    • What is the purpose of a fatigue test?

  • To test the tensile strength of a material
  • To test the durability of a material under cyclic loading (correct)
  • To test the hardness of a material
  • To test the yield strength of a material

    • What type of cyclic loading is commonly used in testing?

  • Repeated stress cycle
  • Random stress cycle
  • Reversed stress cycle (correct)
  • Uniaxial stress cycle

    • What is the formula for mean stress (σm)?

    <p>$σm = (σmax + σmin) / 2$</p> Signup and view all the answers

    What is the formula for stress amplitude (σa)?

    <p>$σa = (σmax - σmin) / 2$</p> Signup and view all the answers

    What is the purpose of an S-N curve?

    <p>To determine the number of cycles to failure at a given stress amplitude</p> Signup and view all the answers

    What type of fatigue tester is used for axial loading?

    <p>Axial Loading Fatigue Tester</p> Signup and view all the answers

    What is the formula for stress range (σr)?

    <p>$σr = σmax - σmin$</p> Signup and view all the answers

    What is the stress ratio (R) formula?

    <p>R = σmin / σmax</p> Signup and view all the answers

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