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根据燃烧环境中高装填固体推进剂药柱内应力的分布特征，提出了药柱内腔表面的两种典型裂纹， 即横向表面裂纹和纵向表面裂纹， 并分别采用方坯药柱和圆盘药柱表面预制的裂纹进行了模拟。比较燃气作用下两种药柱的有限元分析结果， 明确了挤裂模式对于燃烧环境中固体药柱表面裂纹问题的适用性。这些结论与实验观测现象非常吻合， 对实际发动机工作环境中固体药柱表面裂纹的力学行为预示和故障分析有着重要的指导意义。
According to the distribution characteristics of internal stress in high loading solid propellant grains in combustion environment, two typical cracks on the surface of the inner cavity of the grain are proposed, namely transverse surface cracks and longitudinal surface cracks, Surface prefabricated cracks were simulated. Comparing the results of the finite element analysis of two kinds of grains under the effect of gas, the applicability of the mode of extrusion to the problem of surface crack on solid column in combustion environment was clarified. These conclusions are in good agreement with the experimental observations, which are of important guiding significance for predicting and analyzing the mechanical behavior of solid grain surface cracks in the actual engine working environment.