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复合固体推进剂的各项性能与其细观结构密切相关,建立一个准确有效的细观颗粒填充模型是对推进剂进行细观分析的前提,本文运用数字图像技术处理复合固体推进剂的电镜图片,提取其细观颗粒分布信息,通过拟合颗粒的边缘,建立推进剂圆形颗粒与椭圆形颗粒填充模型。研究表明:采用数字图像处理能有效提取复合推进剂的细观结构形貌,本文建立的填充模型,能反映推进剂的真实细观形貌。基于本文模型的细观分析,比计算机模拟生成的模型更能准确的反映材料的真实属性,有利于与原位拉伸实验进行对比。椭圆形颗粒填充模型在填充效果与反映材料属性方面优于圆形颗粒填充模型。
The properties of the composite solid propellant are closely related to the mesostructure. Establishing an accurate and effective mesoscopic particle filling model is a prerequisite for the mesoscopic analysis of propellants. In this paper, digital image processing of electron microscopy images of composite solid propellants, The mesoscopic particle distribution information was extracted. By fitting the edge of the particle, a model of filling round particle and oval particle was established. The research shows that the digital image processing can effectively extract the mesostructural features of the composite propellant. The filling model established in this paper can reflect the real mesostructure of the propellants. Based on the mesoscopic analysis of this model, the model generated by computer simulation can more accurately reflect the true properties of the material, which is in favor of the comparison with the in-situ tensile test. The oval particle filling model is superior to the circular particle filling model in terms of filling effect and reflecting material properties.