复合固体推进剂脱湿研究进展

The dewetting in composite solid propellant is an important factor affecting the structural integrity of propellant grains.The quantitative characterization of evolutionary behavior and failure mechanisms of dewetting has been the major concern of domestic and foreign research.In this paper,the related research progresses in the method of characterization of dewetting throughout the world are reviewed in terms of observation and characterization method,theoretical model and numerical simulation.The pros and cons of each method are compared.The future research direction,key point and the way of future research in this field are pointed out.The research in the quantitative characterization by using high-precision and real-time detection system is of great importance to revealing failure cause of dewetting of composite solid propellants.In terms of theoretical model,the research in dewetting damage and chemical reaction coupling theory and model should fully consider different factors of damage and failure mode.It is also the case for the research of dynamic damage constitutive relations of solid propellant,in order to promote the development of the research about dewetting characterization techniques and the failure mechanisms.In terms of numerical simulation,the numerical model and calculation method based on meso-scale should be developed,which must take into account comprehensively the meso-scale factors such as volume fraction, particle size,shape,arrangement and interface performance.These strategies would further improve the calculation accuracy and efficiency.