Study on LBB Criterion of High Pressure Reactors for Polyethylene Production : 2nd Report, Stress Intensity Factor of Internal Pressure Cylinder and LBB Criterion

Abstract

to study on the leak before break, namely LBB criterion of high pressure reactors for polyethylene production, the validity of the stress intensity factor formulas proposed by Newman-Raju, Iwadate et al. and Nakazawa et al. were discussed. When Newman-Raju's stress intensity factor formula without considering the back surface magnification factor is used, the condition of K₁≥ K_IC(J) gives a good criterion for LBB condition.