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Strength of Materials Test 3
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  • Question 1/6
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    For an element under the effect of bi-axial state of normal stress, the normal stresses on a 45° plane is equal to
  • Question 2/6
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    Match List I (Failure Theory) with List II (case in which they are applicable) and select the correct answer using the codes given below.

     

    List I

     

    List II

    P

    Rankine theory

    i.

    Most conservative theory

    Q

    Tresca theory

    ii.

    Brittle Material

    R

    Von Mises theory

    iii.

    Ductile Materials

  • Question 3/6
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    The value of the principal stress at a point in a plane stressed element is σx = σy = 500 MPa calculate the value of normal stress acting (MPa) at the angle of 45° at X axis.
  • Question 4/6
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    In a plane strain problem in the x-y plane, the Shear strain = 12 × 10-6, Normal strain in the x-direction = 4 × 10-6, and Normal strain in the y-direction is zero. The diameter of the Mohr’s circle of strain is
  • Question 5/6
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    In a 2-D stress system, the value of direct stress on two mutually perpendicular planes are 120 MN/m2 and σ MN/m2. These planes also carry a shear stress of 40 MN/m2. If the factor of safety on elastic limit is 3, then value of σ (in MPa), when shear strain energy is minimum 
  • Question 6/6
    1 / -0
    At a point in a strained material ; the principal stresses are p1, p2, and 0 (p1 being the major and p2 being the minor principal stress). What combination of principal stresses will give the same factor of safety (FOS) by yielding according to the maximum shear stress theory & the distortion energy theory of failure? Assume the principal stresses are tensile in nature.
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