Split Hopkinson Pressure Bar Test on Limestone

Cycle impact experiments of limestone rock specimens are carried out with a large-sized(<em<φ</em<75 mm) split Hopkinson pressure bar (SHPB) experiment system,the dynamic stress-strain relationships of limestone rock in the impact process are plotted. The energy distribution during the impact process is quantitatively studied, with energy dissipation revealed. At the same time, with the ultrasonic measuring technology, the damage values of limestone rock during the impact are presented. Finally, the relationgship between damage and the stress wave, damage and the energy loss were revealed: the former couple is exponentially related, which can be self-consistent in cyclic impact experiments; the later couple shows a simple linear relationship.