ISRO Mechanical & Aerospace 2012 - Question 40

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The engineering and true strains for a bar which is doubled in length during tension test are

  • A. e = 1.0 epsilon = 0.693
  • B. e = 2 epsilon = 1
  • C. e = 1/2 epsilon = 1/2
  • D. None

Answer: A. e = 1.0 epsilon = 0.693

Explanation: e = (2L-L)/L = 1. epsilon = ln(2L/L) = ln(2) = 0.693.

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