复合固体推进剂细观力学性能模拟研究进展

Progress on the simulation of mesomechanics properties of composite solid propellants

阐述了近年来国内外复合固体推进剂细观力学性能模拟的研究进展,分别从复合固体推进剂细观模型建立和数值模拟分析2个角度分别研究复合固体推进剂的宏观力学性能。介绍了复合固体推进剂细观模型建立的几种方法以及先进的数值模拟技术,综述了机器学习在复合推进剂细观力学性能研究中的应用,并结合当前研究动态和相关技术的进展,对该领域的未来进行展望。分析认为,在细观模型建立方面,分子动力学实现三维RVE计算模型是难点,重点关注含内部损伤的细观本构模型,克服推进剂小变形的不足;在细观尺度数值模拟计算方面,建议在充分包含的细观组成和计算资源成本之间取得平衡,进一步发展能够兼顾计算效率和准确度的复合固体推进剂细观尺度的模拟计算方法。

The mesomechanics properties of composite solid propellants are closely correlated with the microscopic composition and damage status.Investigating the evolution of micro-pores and micro-cracks in composite solid propellants and their influence on macroscopic mechanical properties is essential.The research progress on the simulation of the microscopic mechanical properties of composite solid propellants at home and abroad in recent years is described,and the macroscopic mechanical properties of composite solid propellants are investigated from the perspectives of composite solid propellant microscopic model building and numerical simulation and analysis,respectively.Several methods of composite solid propellant mesoscopic scale model establishment and advanced numerical simulation techniques are introduced,and the application of machine learning in the study of composite propellant mesoscopic scale mechanical properties is reviewed,and the future prospect of the field is made in the light of the current research dynamics and the progress of related technologies.It is analyzed that,in terms of mesoscopic scale model building,molecular dynamics to achieve three-dimensional RVE computational model is the difficult point,focusing on the mesoscopic scale intrinsic model containing internal damage to overcome the shortage of small deformation of the propellant.In terms of mesoscopic scale numerical simulation computation,it is suggested to strike a balance between sufficiently included mesoscopic scale compositions and the cost of computational resources,and to develop the mesoscopic scale simulation computation method of composite solid propellants which is capable of taking into account both the computational efficiency and the accuracy.It is recommended that a balance be struck between adequate inclusion of mesoscopic scale composition and the cost of computational resources,and the development of simulation methods that can balance computational efficiency and accuracy at the mesoscopic scale of composite solid propellants.