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A free bar of length / is uniformly heated from 0°C to a temperature t°C, α is the coefficient of linear expansion and E the modulus of elasticity. The stress in the bar is
[1995]
  • a)
    αtE
  • b)
    αtE/2
  • c)
    Zero
  • d)
    None of these
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
A free bar of length / is uniformly heated from 0°C to a temperatu...
For thermal stress to be devel oped there must be constraint in the system to oppose. So strain develops but there is no thermal stress.
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A free bar of length / is uniformly heated from 0°C to a temperature t°C, α is the coefficient of linear expansion and E the modulus of elasticity. The stress in the bar is[1995]a)αtEb)αtE/2c)Zerod)None of theseCorrect answer is option 'C'. Can you explain this answer?
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