复合固体推进剂界面多尺度数值模拟研究进展

Advancements in Multiscale Numerical Simulation of Composite Solid Propellant Interfaces

固体推进剂界面作为固体发动机结构中力学性质相对薄弱的部分之一,明确其物化性质、损伤演化模式以及脱湿对推进剂结构完整性的影响是极其重要的研究内容。与实验相比,利用数值模拟能够快速、高效地研究各种界面体系下的不同物化性质,具有较好的应用前景。从微观尺度分子动力学、细观尺度有限元数值仿真与宏观数值模拟角度出发,综述了复合固体推进剂多种界面力学性质的研究进展,探讨了多尺度下复合固体推进剂界面数值模拟对固体推进剂工程设计的推动作用与目前存在的不足,并展望了未来的发展方向。

As one of the mechanically vulnerable components in the structure of solid rocket motors,it is extremely important to clarify the physical and chemical properties of the interface for solid propellants,damage evolution patterns,and the effect of dewetting on the integrity of the propellant grain structure.Compared with experiments,numerical simulation can quickly and ef-ficiently study the different physicochemical properties of various interface systems,and has good application prospects.From the microscale molecular dynamics that can reveal the mechanism of experimental phenomena from a molecular perspective,the mesoscale finite element numerical simulation considering the microstructure of complex filler particles and other materials in solid propellants,and the macroscopic numerical simulation closely related to the macroscopic mechanical response,the re-search progress of various interface mechanical properties for composite solid propellants was reviewed,the driving effect of nu-merical simulation for composite solid propellant interfaces at multiple scales on solid propellant engineering design at multiple scales and the current shortcomings were discussed,and the future development directions were also put forward.