Answer to Question #293707 in Mechanical Engineering for Niaz

Question

A thick-walled cylinder of 450 mm outside diameter and 340 mm inside diameter, made of BS 535 A99 steel alloy, is subjected to an internal pressure of P. The maximum depth of radial crack in longitudinal direction on the outer surface of this cylinder is 22 mm. If the factor of safety against fracture failure of this cylinder is 3.1, what maximum safe internal pressure (P) can be applied to the cylinder?

Answer 1

Do=450mm

Di=340mm

ip=P

r=22

F.S=3.1

$P=\frac{\sigma 4t}{d}$

$=\frac{22*4*55}{340}$

=14.24Pa