Research on Dynamic Compressive Testing and Mechanical Properties of Silicon Rubber

By use of split Hopkinson pressure bars (SHPB) technique, a kind of silicon rubber is investigated for understanding its dynamic constitutive behaviors at high strain rates. Experimental results show that silicon rubber is strain-rate sensitive. It shows viscoelastic characteristics at room temperature and high strain rates. Pulse shaping technique is utilized to ensure the dynamic stress equilibrium in the specimen and to obtain a constant strain rate. Quartz crystal is used to monitor the stress equilibrium and to measure the weak signal in the experiments of silicon rubber.