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Which of these is NOT a reason shear flow rather than shear stress is used in thin-walled analysis?

  • A.It stays constant along a wall of varying thickness
  • B.Equilibrium arguments are simpler in terms of it
  • C.The stress is recovered easily by dividing by thickness
  • D.Shear flow is easier to measure experimentally

Answer: D

Correct answer: Shear flow is easier to measure experimentally

The other three are genuine reasons: constancy along a tapering wall, simpler equilibrium equations, and easy recovery of the stress at the end. Measurement is not among them - what a gauge senses is strain and hence stress at a point, and the shear flow has to be inferred from it by multiplying by the thickness.

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