Question

A cylindrical steel pressure vessel 30 cm in diameter and 1.5 cm thick contains a small surface crack, oriented normally in the direction of the hoop stress. (a) Confirm that there is a leak condition before rupture, since the container experiences a cyclic gas pressure between 40 and 50 MPa and the fracture resistance of the material is 180 MPa√m. (b) At the point where the crack broke the wall thickness, calculate the rate of advance of the fatigue crack.

Dado que E = 205 GPa y b = 2.48 X 10^-10 m.

Answer 1

The solution of the given problem is shown in below:-