两篇:
固体推进剂应力和应变与使用寿命关系
Relationship between stress-strain and service life of solid propellant
【摘要】 以Eying动力学公式为基础,结合推进剂应力-应变关系公式,将应力应变因素引入动力学公式,推导出了应力和应变与动力学公式的关系,并利用定载荷试验和定应变试验验证了上述关系。研究表明在推进剂的老化过程中,应力和应变的作用等效于降低了推进剂老化的表观活化能,从而加速推进剂的老化。应力对活化能作用系数γ的计算结果表明,应力和应变对加速推进剂老化、缩短推进剂寿命的作用是显著的。利用推导出的应力和应变与动力学公式的关系,可以使推进剂寿命预测的结果更接近于发动机中推进剂的实际使用寿命。
【Abstract】 Based on the Eying dynamics formula and stressstrain relation of solid propellant,the factors of stress and train were involved in the dynamics formula to obtain the relationships between them,and the relationships were validated by constant load test and constant strain test.The investigation shows the effects of stress and strain,which accelerate the aging of propellant.It is equivalent to the effect of reducing the aging apparent activation energy.The calculated result of coefficient γ indica... 更多
【文献出处】 推进技术 ,Journal of Propulsion Technology , 编辑部邮箱 ,2006年04期
方坯药预测寿命与发动机推进剂药柱实际寿命差异研究
Investigation on the differences between predicted lifetime of propellant carton and actual lifetime of motor propellant grain
【摘要】 从固化条件、贮存条件、应力状态条件和预测方法 4个方面,分析了方坯药预测寿命与发动机推进剂药柱实际寿命存在差异的原因。针对以上原因提出了用修正因子、受力状态模拟试验和老化动力学研究等方法来减少这种差异的技术途径,以提高推进剂寿命预测的准确性。
【Abstract】 The differences between predicted lifetime of the propellant carton and actual lifetime of the motor propellant grain were analyzed from four aspects of curing condition, storage condition, stress condition and predicted method. By using correction factors, stress simulation test and ageing dynamics methods, the approaches to reduce the differences were put forward to improve accuracy of predicted lifetime.
固体火箭技术 ,Journal of Solid Rocket Technology , 编辑部邮箱 ,2005年01期 |