Abstract
To obtain the dynamic and quasi-static mechanical properties of modified double-base propellant at low temperature, the uniaxial compressive experiments have been performed both on the universal testing machine and the Split Hopkinson Pressure Bar apparatus. True stress-true strain curves over a wide range of strain rate at -20°C were presented, from 1.1×10-3s-1 to 6×103s-1. The results suggest that modified double-base propellant is a significant strain rate dependent material, and the initial modulus of elasticity and the yield strength increases along with the strain rate, which shows more strain rate sensitiveness at high strain compared at low strain rate.
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