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Current Topic:
To reduce inside diameter of metal cylinder by force
1. Yes, if you radially compress a tube, the internal diameter decreases. A force distributed over an area is a stress or pressure.
2. Which method you use to calculate this will depend on how accurate you want the answer to be.
For an approximation for a thin walled tube, assume constant circumferential stress & calculate the circumferential stress in the tube:
Sc = Po *D/(D-d)
Estimate ratio of stressed size to unstressed size:
d(stressed) = d(unstressed) * (1-Sc/G)
where
Po is the pressure applied to the outside the tube
G is youngs modulus for brass
Sc is the circumferential stress in the brass tube
A solid mechanics text book should have a more accurate method of calculating change in inside diameter.
3. The tube gets longer. The ratio of change in length to change in diameter is called the poissons ratio.
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