Dynamic deformation under a modified split Hopkinson pressure bar experiment

This paper presents,a modified split-Hopkinson pressure bar (SHPB) techniqu e. The dynamic stress-strain behaviors were estimated at room temperature a nd subzero temperature to -75 degrees C by using the conventional SHPB and compared with a modified SHPB technique. A computer simulation using a fini te element algorithm is also performed to study the dynamic material respon ses. Furthermore, we attempt to find a proper material constitutive law by using the simulation process. It is suggested that the modified SHPB test u sed in this study can be successfully utilized to offer an experimental con dition of a higher strain rate than that obtained from the conventional SHP B test.