Numerical modeling of stress-strain behavior of composite overwrapped pressure vessel

AbstractPresented is a numerical modeling analysis of the stress-strain behavior of composite overwrapped pressure vessel with a metal liner loaded by internal pressure. The proposed model is based on finite element method and considers elasto-plastic behavior of the liner, the fiber orientation angle in composite material and contact between liner and composite shell. The model allowed solving problems of determination of stress-strain state, degradation of composite material and fracture assessment of crack-like defect in the liner. The results revealed the effect of propagation of initial defects in composite shell and the critical size of surface crack