ISRO Mechanical & Aerospace 2013 - Question 2

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A cantilever beam is subjected to a UDL. The cross section of the beam is a H-Section placed as shown in Fig. The bending stress distribution across the cross section will be

Figure for question 2, ISRO Mechanical & Aerospace 2013

  • A. Figure (a)
  • B. Figure (b)
  • C. Figure (c)
  • D. Figure (d)

Answer: C. Figure (c)

Explanation: Bending stress \sigma = My/I. Stress varies linearly with distance y from the neutral axis. It is zero at the neutral axis and maximum at the extreme fibers. The distribution is linear regardless of the cross-section shape (as long as it's symmetric bending).

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