Hi please solve this problem for my mech design class Thanks

Hi please solve this problem for my mech design class. Thanks

A cylinder subjected to internal pressure p_i has an outer diameter of 14 in and a 1-in wall thickness. For the cylinder material, K_IC = 72 kpsi. squareroot in, S_y = 170 kpsi, and S_ut = 192 kpsi. If the cylinder contains a radial crack in the longitudinal direction of depth 0.5 in determine the pressure that will cause uncontrollable crack growth.

Solution

The answer of following question is as follows .

The pressure that will cause the uncontrollable crack growth is 67 mpa.