Study on Applicability of Phase Field Method in Quasi-Static Fracture Behavior Simulation of PBX Components

Abstract Crack in polymer bonded explosive (PBX) components will influence the safety and reliability of weapon system. In order to accurately simulate quasi-static fracture behavior PBX components, arc Brazilian experiment was carried out first. Then, phase field method (PFM) traditional extended finite element (XFEM) are used for comparative simulation Brazil test process, which both maximum principal stress strain initiation criterion XFEM simulation. The calculation results show that relative error failure load calculated by PFM is small (less than 1%), while large (the -61% 42% respectively). Meanwhile, locations located at 1/4 3/4 away from end face sample, good agreement with experimental results. addition, avoids problems crack mutation discontinuity XFEM. can calculate components.