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The strain hardening behaviour of an annealed rod during cold rolling is given by 
If a wire of 5 mm diameter is drawn from the above cold rolled rod of 10 mm diameter, the drawingstress, neglecting the effect of friction and redundant work, is approximately
  • a)
    650 MPa
  • b)
    550 MPa
  • c)
    450 MPa
  • d)
    400 MPa
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
The strain hardening behaviour of an annealed rod during cold rolling ...
The strain here is true strain. So,
Strain = ln(Ai/Af) = ln(di/df).
df= final diameter
di= initial diameter

Put this value and you will get the answer.
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The strain hardening behaviour of an annealed rod during cold rolling is given by If a wire of 5 mm diameter is drawn from the above cold rolled rod of 10 mm diameter, the drawingstress, neglecting the effect of friction and redundant work, is approximatelya)650 MPab)550 MPac)450 MPad)400 MPaCorrect answer is option 'A'. Can you explain this answer?
Question Description
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