Experimental research on accelerated aging of solid propellant under alternating temperature

Abstract

The storage environment of solid rocket motor charge is always alternating. In order to study its effect on the performance of solid rocket motor charge, the accelerated aging experiments under different temperature range, temperature change period and aging time were performed. The degradation and failure surfaces of propellant mechanical properties under the condition of alternating temperature aging are given. The results show that with the increase of the temperature range in the alternating temperature aging test, the cumulative damage of the propellant specimen increases and the elongation decreases faster. With the decrease of temperature change period, that is, the faster the temperature change frequency is, the faster the elongation decreases. Compared with traditional high temperature accelerated aging test, alternating temperature accelerated aging test is closer to reality.

Keywords

• Solid propellant
• Alternating temperature
• Accelerated aging
• Mechanical properties