Strength of Materials: Simple Strain and Deformation
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Questions and Answers

What is the unit of measurement for the Modulus of Elasticity of steel?

  • Megapascals (MPa) (correct)
  • Millimeters per millimeter (mm/mm)
  • Radians
  • Pounds per square inch (psi)

    • What happens to a material when it is subjected to loads and its modulus of elasticity is high?

  • It breaks or fractures
  • It bends or flexes easily
  • It undergoes plastic deformation
  • It maintains its shape and does not deform (correct)

    • What type of strain occurs when the layers of a material slide past each other due to applied forces?

  • Normal strain
  • Tensile strain
  • Axial strain
  • Shear strain (correct)

    • What is the dimension of the strain quantity?

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

    What is the typical range of the Modulus of Elasticity for structural steel?

    <p>200,000 to 210,000 MPa</p> Signup and view all the answers

    What type of deformation occurs when a material returns to its original shape after stress is removed?

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

    What is the main assumption in determining stresses in thin-walled pressure vessels?

    <p>The stresses are uniformly distributed</p> Signup and view all the answers

    Which of the following is a fundamental concept in the study of strength of materials?

    <p>Hooke's Law</p> Signup and view all the answers

    What is the primary difference between normal (axial) strain and shear strain?

    <p>Direction of deformation</p> Signup and view all the answers

    At what point on a stress-strain diagram does the material begin to deform plastically?

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

    What is the term for the ratio of lateral contraction to longitudinal extension in a material?

    <p>Poisson's Ratio</p> Signup and view all the answers

    Which of the following is a characteristic of material behavior within the proportional limit?

    <p>Linear stress-strain relationship</p> Signup and view all the answers

    What is the relationship between deformation and strain in materials?

    <p>If there is deformation, there is strain, and if there is strain, there is deformation</p> Signup and view all the answers

    According to Hooke's Law, what is the relationship between stress and strain in a material?

    <p>σ = Eϵ</p> Signup and view all the answers

    What is the Young's modulus of elasticity (E) a measure of in a material?

    <p>The material's stiffness</p> Signup and view all the answers

    What is the primary difference between a material's proportional limit and its elastic limit?

    <p>The proportional limit is the point of linear stress-strain behavior, while the elastic limit is the point of plastic deformation</p> Signup and view all the answers

    What occurs when a material undergoes plastic deformation?

    <p>The material's shape and size change permanently</p> Signup and view all the answers

    What is the primary purpose of a stress-strain diagram?

    <p>To determine a material's proportional and elastic limits</p> Signup and view all the answers

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