Application of numerical simulation to SHPB test to investigate the dynamic compressive behavior of material with failure

The Split Hopkinson Pressure Bar (SHPB) technique is widely used to obtain stress-strain curve of material at high strain rate. For the purpose to investigate material model with failure, a numerical simulation technique is utilized together with experiment. The Johnson-Cook model, one of the empirical formations to express the effect of strain rate on flow stress, has been included into ABAQUS code using user material subroutine (UMAT). The maximum strain failure criterion is also introduced to describe failure of material. A demonstration analysis of SHPB test for virtually predefined material has performed and shows usefulness of the numerical simulation to obtain mathematical expression of the strain rate dependent stress-strain relation.