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The true strain for a low carbon steel bar which is doubled in length by forging is   
  • a)
    0.307
  • b)
    0.5
  • c)
    0.693
  • d)
    1.0
Correct answer is 'C'. Can you explain this answer?
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The true strain for a low carbon steel bar which is doubled in length ...
Ans. (c)
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The true strain for a low carbon steel bar which is doubled in length ...
True strain is given by natural log of FINAL LENGTH BY ORIGINAL LENGTH. therefore ln(2L/L)= ln(2) = 0.693
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The true strain for a low carbon steel bar which is doubled in length ...
When length gets doubled den new length=2l(say length=l) Now engineering strain=(2l-l)/l=1 put the formula for true strain now n get value of log 2 with base e=0.69
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