Force Equilibrium and Compatibility of Strain in Composite Materials
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Questions and Answers

What type of forces are compressive and tensile forces?

  • Normal forces
  • Applied forces
  • Indirect forces
  • Direct forces (correct)

    • Which of the following is NOT a reason for solid mechanics being a vast subject?

  • Wide range of materials
  • Limited applications (correct)
  • Wide range of applications
  • Various types of deformations

    • What happens to a body under a compressive force?

  • It gets shorter (correct)
  • It twists
  • It deforms
  • It gets longer

    • Which type of stress is defined as the force per unit area perpendicular to which it acts?

    <p>Normal stress</p> Signup and view all the answers

    How does normal stress arise?

    <p>From uniformly applied direct forces</p> Signup and view all the answers

    What is the concept used to obtain the distribution of force acting over a sectioned area?

    <p>$\sigma=P/A$</p> Signup and view all the answers

    What type of stress is maximum on a bar in tension?

    <p>Zero shear stress and maximum normal stress</p> Signup and view all the answers

    When considering stress elements, how many basic states of stress exist at a point in a stressed body?

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

    How are the force components resolved on an inclined section through a bar?

    <p>Normal and shear forces</p> Signup and view all the answers

    What is the relationship between the force components and the inclined plane in stress analysis?

    <p>Force components are tangent to the inclined plane</p> Signup and view all the answers

    In terms of the rotated coordinate system x1y1, when may a material yield or fail?

    <p>At any angle other than 90 degrees</p> Signup and view all the answers

    How are stresses distributed on inclined sections in a bar?

    <p>Uniformly distributed throughout the bar</p> Signup and view all the answers

    What is the relationship between the strains of the concrete block and the steel bar in a composite material?

    <p>They are equal: ε1 = ε2</p> Signup and view all the answers

    In force equilibrium for a composite material, what does F = F1 + F2 represent?

    <p>Resultant force of the composite material</p> Signup and view all the answers

    What assumption leads to the shortening being the same inside material 1 and material 2?

    <p>Perfect bonding assumption</p> Signup and view all the answers

    In Example 9, what is the expression for σs in terms of Ec and σc?

    <p>(Ec σc) / Pc</p> Signup and view all the answers

    What is the condition for plane stress in the xy plane for a 3D element?

    <p>σz = 0 and τzx = τxz ≠ 0, τZY = τYZ = 0</p> Signup and view all the answers

    What is the main purpose of representing stresses using stress elements?

    <p>To simplify stress analysis</p> Signup and view all the answers

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