固体推进剂动态力学行为研究进展

从动态力学表征、损伤机理、动态断裂和动态本构4个方面,对固体推进剂动态力学行为进行了综述。分析表明,动态力学实验重点关注固体推进剂的初始弹性模量、屈服应力、强度等参数,填充颗粒破裂是动态损伤的主要形态,动态断裂主要集中动态起裂研究,并对3类动态本构模型性进行了评述。在此基础上,梳理了下一步研究的重点,认为深化实验研究、力学数值模拟和含损伤热粘-超弹性动态本构模型将是下一步研究的重点。

Research progress in dynamic mechanical behavior of solid propellants

The current situation about dynamic mechanical behavior of solid propellants was summarized from the aspect of dynamic mechanical characterization,damage mechanism,dynamic fracture and dynamic constitutive models.Analysis results show that dynamic mechanical experiments focused on the parameters such as initial elastic modulus,yield stress and strength;the filler particles fracture was the main form of dynamic damage;the dynamic fracture mainly concentrated in the field of crack initiation,and three types of dynamic constitute models were reviewed.On this basis,the future key research directions were also briefly presented,considering that deepening experiment research,mechanical numerical simulation research and the exploitation of thermo-visco-hyperealstic dynamic constitutive model incorporating damage will be the focus of future research.