SHPB기법을 사용한 고온에서의 Al 7075-T6의 동적 변형 거동

초록

The split Hopkinson pressure bar (SHPB) technique is extensively used to characterize material deformation behavior under high strain rate condition. In this study, the dynamic deformation behaviors of aluminum alloy 7075-T6 under high strain-rate and high temperature are investigated by using a modified SHPB technique with the pulse shaper technique. Parameters in the Johnson-Cook constitutive equation are determined by using the SHPB experimental data including the effects of strain rate, temperature, strain hardening and thermal softening of the material.