Quasi-Brittle Fracture of Beryllium: Model and Validation

A brittle fracture model, QBrT describes ductile-brittle transition in metal without an initiation criterion. It is a mechanism-based, continuum-level model that uses the damage tensor and parameters to degrade the stiffness tensor under tensile loading. A viscoplasticity model is also incorporated in QBrT to fully account for the material behavior in a wide range of strain rates and temperatures. Quasi-brittle materials, beryllium and stainless-steel, 304L are considered as applications, and we show the simulation results of flyer plate and the experimental data, which are in good agreement.