Question

A harmless or harmful crack? (20) routine inspection, a crack was detected in a cylindrical pressure vessel having a wall thickness 186 mm. characteristic dimension (a) of this crack was measured to be 0.025 m and it was acted on by a hoop stress -120MPa. For this crack configuration, the stress intensity factor may be calculated using π.a auwhere O-2.93 racture toughness of the vessel material is KIc -59MPavm e need to worry about this crack? late the factor of safety in terms of crack length.

Answer 1

Iiven dedn' та 2.q3 a 120J 3-14 : 0.225 m a = 225 mm 0.226 tarms e6 crack length = 9