固体火箭技术2025，Vol.48Issue(5)：696-703,8.DOI:10.7673/j.issn.1006-2793.2025.05.007
基于分形维数的固体推进剂损伤表征方法
Characterization method for solid propellant damage based on fractal dimension
摘要
Abstract
The microscopic damage of solid propellant is an important factor affecting its mechanical behavior,and it is of great significance to quantitatively characterize its properties.The damage evolution process of a PBT propellant under constant speed ten-sile state was studied by means of in-situ tensile test and high-power optical microscope observation.By intercepting the image during the tensile process of the sample,the damage part was extracted after image processing,and the fractal dimension was calculated.The damage evolution process of the propellant under uniaxial tension was quantitatively analyzed,and the difference between porosity and fractal dimension in characterizing damage was compared.The results show that the damage of PBT propellant far away from the tensile fracture has no obvious development and evolution process,and the fractal dimension increases slowly.At the tensile fracture,PBT propellant has obvious damage evolution process,and the fractal dimension shows a trend of increasing first and then flattening,which is similar to the change trend of stress-strain curve.关键词
固体推进剂/分形维数/PBT/损伤表征/原位拉伸Key words
solid propellant/fractal dimension/PBT/damage characterization/in-situ stretching分类
航空航天引用本文复制引用
乔一舟,吴伟静,申志彬..基于分形维数的固体推进剂损伤表征方法[J].固体火箭技术,2025,48(5):696-703,8.基金项目
国家自然科学基金(12372203) （12372203）
湖南省杰出青年基金项目(2021JJ10046) （2021JJ10046）
中国博士后科学基金资助项目(2022M723916) （2022M723916）
湖南省研究生创新训练项目(CX20220066). （CX20220066）
