Progress on the simulation of mesomechanics properties of composite solid propellants
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.
composite solid propellantmechanical propertiesmicromechanics modelfinite element analysisdigital image processingmachine learning
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