Accelerated Aging Testing Method Research on Composite Propellant under Cyclic Temperature Load

Accelerated aging test under cyclic temperature load was designed to ensure that accelerated aging could preferably simulate natural storage of HTPB composite propellant. The aging test was designed in the temperature range from -10 degrees C to 60 degrees C at three different rate-temperature. Mechanical properties of HTPB propellant were measured and analyzed. The test process was analyzed by numerical simulation. The correlation between accelerated aging and natural storage was analyzed in terms of elongation. The results indicate that the tensile strength increased and the elongation decreased after accelerated aging, showing the same trend, of natural storage; the mechanical properties of HTPB propellant is strongly influenced by the rate-temperature; adhesive interphase is prone to failure because of the alternating stress, temperature cycling accelerated aging test is consistent well with natural storage. The results can be very helpful for solid rocket motor life prediction.