To obtain the fatigue properties of hydroxyl-terminated polybutadiene(HTPB) propellant at low temperature

high-cycle fatigue tests including variable strain amplitudes and frequencies were conducted by taking practical application of tactics missile into account.Test equipment was a dynamic mechanical analyzer and temperature was kept constant at -50℃

frequencies at 50

100

150Hz.Before cyclic loading

quasi-static loading was carried out to investigate the effect of small pre-strain on fatigue properties of HTPB propellant at low temperature.Also

axial tensile tests at constant strain rates were made to acquire mechanical parameters after fatigue tests.The results indicate that with the increasing strain amplitude and loading frequencies

the mechanical properties degradation degree and fatigue damage increase.Initial quasi-static loading has a negative effect on fatigue properties and fatigue damage evolution demonstrates the non-linear characteristics

while fatigue damage accumulation slows down along with the cyclic numbers.