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ESE 90 DAYS_Theories of Failures
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Question 1
The principle stress at a point in an elastic material are σ (Compressive),
2σ (tensile), σ(tensile). The elastic limit in tension is 200 MPa and μ = 0.3. Value of σ at faiture when computed by maximum strain energy theory.
Question 2
A point in a solid shaft under action of bending moment and twisting moment develops principal stresses as σ1 = 80 N/mm2 (tensile) and σ2 = 30 N/mm2 (compressive). Shaft material is ductile with yield strength of 210 MPa, Poisson’s ratio μ = 0.25. Determine the factor of safety according to maximum principal strain theory.
Question 3
Which of the following statements is NOT correct regarding theories of failure?
Question 4
Match List 1 with List 2 and select the answers using the code given below
List 1
(i) Maximum principle stress theory
(ii) Maximum principle strain theory
(iii) Maximum strain energy theory
(iv) Maximum shear stress theory
List 2
(a) St. Venant Theory
(b) Tresca Theory
(c) Rankine Theory
(d) Haigh theory
Question 5
The hollow cylindrical shaft having outside and inside diameters as 6 and 4 as shown. Find the shearing stress at point X which is inside the hollow shaft surfaces. Assume T=48,500 in-lb.
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May 8ESE & GATE CE