关键词: 固体火箭推进剂;寿命预测;粘弹性;热应力;累积损伤

Abstract: n analysis on thermal stress of solid rocket motor grain in storage due to ambienttemperature variation is presented according to elastic-viscoelastic correspondence principle, and theeffects of ageing on mechanical properties of the propellant are included. The damage of grain is calculated and the motor life is predicted. The predicting theory and method can be referred in other relatedtechnical designs.

Key words: Solid rocket propellant;Life prediction;Viscoelasticity;Thermal stress;Cumulative damage