Dynamic deformation under a modified SHPB experiment

초록

This paper presents a modified slit-Hopkinson pressure bar (SHPB) technique . The dynamic stress-strain behaviors were estimated at room temperatureand subzero temperature to -75c by using the conventional SHPB and compared with a modified SHPB technique. A computer simulation using a finite element algorithm is also performed to study the dynamic material responses. Furthermore, we attempt to find a proper material constitutive law by using the simulation process. It is suggested that the modified SHPB test used in this study can be successfully utilized to offer an experimental condition of a higher strain rate than that obtained from the conventional SHPB test