Impact resistance prediction of superalloy honeycomb using modified Johnson–Cook constitutive model and fracture criterion

Abstract

In this study, to further understand the containment properties of a containment ring, the deformation behavior of GH3536 superalloy used as the material of the containment ring were investigated over a wide range of temperatures and strain rates. The effects of stress triaxiality, temperature, and strain rate on the fracture behavior of the superalloy were analyzed. According to the temperature and strain rate dependences of the deformation behavior, the original Johnson-Cook constitutive model (J––C model) was unable to describe such behavior, and a modified J–C model was developed. In view of the stress triaxiality, temperature and strain rate dependences of the fracture behavior, the original Johnson–Cook fracture criterion (J–C criterion) was inapplicable to describe such fracture behavior, and a modified J–C criterion was proposed. Finally, the impact resistance of honeycomb structure made from the superalloy and applied on the containment ring were tested at different temperatures, impact velocities and impact angles. Using the modified J–C model and J–C criterion, the resistance property of the honeycomb structure could be accurately predicted.