A new method for the separation of waves. application to the SHPB technique for an unlimited duration of measurement

摘要

The measuring duration of an SHPB (Split Hopkinson Pressure bar) set-up is limited by the length of the bars so that there is a limitation of maximum measurable strains in material testing applications. This paper presents a new two-gauge measurement method which takes account of the correction for wave dispersion effects, which cannot be ignored for long time measurements. Using bars of equal dimensions, it allows a quasi-unlimited measuring duration which can be up to 100 times longer than the classical one.