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建立了复合推进剂颗粒填充引起应力集中的有限元计算模型 ,计算了法向应力的分布及其最大应力的位置 ,讨论了颗粒分数、刚度对应力分布的影响。根据引发微裂纹萌生的力学条件 ,得到了复合固体推进剂占主导地位的损伤形式为颗粒与界面的脱湿微裂纹损伤。
The finite element model of stress concentration caused by particle filling of composite propellant was established. The distribution of normal stress and the position of maximum stress were calculated. The influence of particle fraction and stiffness on the stress distribution was discussed. According to the mechanical conditions that induce the initiation of microcracks, the damage form of composite solid propellants that predominates is the dehumidification microcrack damage of particles and interface.