Shpb experiment of plain concrete

The incident wave and transmission wave varing with the time have been obtained by SHPB(Hopkinson separate pressure bar) experiment.The relationship curve for stress and strain of material cement concrete has also been obtained.The history of incidence,reflection and transmitted energies are all obtained,it indicates that the porosity of the cement concrete can be analyzed by the energy dissipation.The semiconductor strain gauge has been used to measure the weak transmission wave successfully.