GAP-ETPE基高能固体推进剂的蠕 性能

In order to study the creep properties of GAP-ETPE-based solid propellant, GAP-ETPE/Al/RDX/AP/GAPA high-energy solid propellants were prepared by calendering process, and the influence factors of loading stress and ambient temperature on the creep properties of propellants were analyzed. Matlab software was used to fit the data of GAP-ETPE-based propellant under different loading stresses and ambient temperatures. The long-term creep behavior was predicted. The results show that the creep strain and residual strain of propellant increase with the increase of loading stress and temperature, and the creep strain is 4.9% under 1.4MPa loading stress at room temperature. The creep strain is 4.0% under loading stress of 0.5MPa at 56℃. The constant creep rate increases significantly with the increase of loading stress, but an extreme point appears near the processing temperature. It is found that the creep resistance of GAP-ETPE-based propellant is better than that of thermosetting propellant. The generalized Kelvin model can fit the creep data of each group more than 0.995, which can describe the creep behavior of GAP-ETPE-based propellant very well. The creep compliance master curve extends the investigation time to 108.1s, which can be used for long-term creep performance prediction and practical application of GAP-ETPE-based propellants.