爆炸与冲击2025，Vol.45Issue(7)：30-40,11.DOI:10.11883/bzycj-2024-0315
动载荷下固体推进剂损伤演化原位成像研究
In-situ tomography on damage evolution of solid propellant under dynamic loading
摘要
Abstract
Structural damages in solid propellants can lead to combustion anomalies and affect ballistic performance.Utilizing synchrotron radiation X-ray computed tomography technology and an in-situ mechanical loading test system,the macro-meso structures of nitrate ester plasticized polyether(NEPE)solid propellant were observed in-situ at compressive rates of 0.1,1.0,and 5.0 mm/s.The compressive process employed an intermittent loading mode.With loading paused each time the preset displacement was reached to enable scanning imaging,thereby capturing the state of the propellant at specific phases during compression.Following the in-situ imaging experiment,the tomographic images of the samples were processed through projection correction and phase recovery using PITRE and PITRE_BM software,followed by image bit-depth conversion to obtain 8-bit 2D grayscale slices.Through 3D reconstruction,the typical damages and evolutionary behaviors of the solid propellant were analyzed,exploring the macroscopic deformation as well as the distribution and propagation patterns of internal micro-cracks.Results indicate that most micro-cracks nucleate and grow at the interface between filled particles and the matrix,with meso-pore evolution being rate-dependent.Unlike the continuous damage growth under tensile loading,the nucleation,growth,and closure of pores occur simultaneously during compression.Under high-rate uniaxial compressive loading,the solid propellant exhibits characteristic trumpet-shaped deformation,with spatially distributed cracks primarily located around the propellant.Macroscopic surface damage results from micro-crack propagation between near-surface particles and the matrix,with crack propagation related to the spatial location of filled particles.Transversal and axial crack propagation modes exist under dynamic compressive loading,with the transition from vertically to horizontally oriented cracks in the matrix leading to crack closure.关键词
固体推进剂/原位动态压缩/损伤率相关性/内部损伤演化/同步辐射三维成像Key words
solid propellant/in-situ dynamic compression/damage rate-related behavior/internal damage evolution/synchrotron radiation 3D tomography分类
数理科学引用本文复制引用
苑永祥,刘岳勋,赵蒙,王龙,侯传涛,王煊军,吴圣川..动载荷下固体推进剂损伤演化原位成像研究[J].爆炸与冲击,2025,45(7):30-40,11.基金项目
国家自然科学基金(52202082) （52202082）
智剑实验室开放基金(2024-ZJSYS-KF02-04) （2024-ZJSYS-KF02-04）
火箭军工程大学青年基金(2021QN-B014) （2021QN-B014）
