论文部分内容阅读
为了获得高低温循环下HTPB推进剂的力学性能变化情况,通过高低温循环实验(又称温度渐变实验)和单向拉伸实验,对HTPB推进剂高低温循环力学性能规律进行了研究。实验结果表明:高低温循环下HTPB推进剂的最大抗拉强度和最大延伸率都随着循环周期数的增加而降低,这与热氧老化下的力学性能变化规律不同。最后,运用灰色理论预测了该实验条件下HTPB推进剂失效时的高低温循环周期数。
In order to obtain the change of mechanical properties of HTPB propellants under high and low temperature cycles, the cyclic and mechanical properties of HTPB propellants at high and low temperatures were studied by means of high and low temperature cycling experiments (also known as temperature gradient experiments) and uniaxial stretching experiments. The experimental results show that the maximum tensile strength and maximum elongation of HTPB propellants decrease with the increase of cycle number under high and low temperature cycles, which is different from the change of mechanical properties under thermo-oxidative aging. Finally, the gray theory was used to predict the number of high and low temperature cycles in the failure of HTPB propellant under this experimental condition.