动载荷下固体推进剂损伤演化原位成像研究

苑永祥; 刘岳勋; 赵蒙; 王龙; 侯传涛; 王煊军; 吴圣川

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

doi: 10.11883/bzycj-2024-0315

苑永祥^1,,
刘岳勋¹,
赵蒙^2, ,,
王龙³,
侯传涛³,
王煊军²,
吴圣川^1, ,

1.
西南交通大学轨道交通运载系统全国重点实验室, 四川成都 610031
2.
火箭军工程大学智剑实验室, 陕西西安 710025
3.
北京强度环境研究所可靠性与环境工程技术重点实验室, 北京 100076

基金项目: 国家自然科学基金（52202082）；智剑实验室开放基金（2024-ZJSYS-KF02-04）；火箭军工程大学青年基金（2021QN-B014）；

详细信息

作者简介:
苑永祥（1999－　），男，硕士研究生，y896422289@163.com

通讯作者:
赵　蒙（1991－　），男，博士，讲师，mengxjtu@163.com

吴圣川（1979－　），男，博士，研究员，wusc@swjtu.edu.cn

中图分类号: O346.5; V512
计量
- 文章访问数: 111
- HTML全文浏览量: 19
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- 被引次数: 0
出版历程
- 收稿日期: 2024-08-29
- 修回日期: 2025-01-09
- 网络出版日期: 2025-01-09

In-situ tomography on damage evolution of solid propellant under dynamic loading

1.
State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
2.
Zhijian Laboratory, Rocket Force University of Engineering, Xi'an 710025, Shanxi, China
3.
Key Laboratory of Science and Technology on Reliability and Environmental Engineering, Beijing Institute of Structure and Environment Engineering, Beijing 100076, China

摘要

摘要: 为研究硝酸酯增塑聚醚固体推进剂内部结构损伤演化行为，采用同步辐射X射线三维成像和自主研发的原位压缩试验系统，在0.1、1.0和5.0 mm/s加载速率下进行了宏细观结构的原位可视化观测，探究了推进剂宏观变形及其内部微裂纹的空间分布与传播模式。结果表明，微裂纹主要形核并生长于填充颗粒与基体界面处，细观孔隙的演化表现出率相关性。与拉伸加载下损伤持续生长不同，压缩过程中孔隙形核、生长与闭合并存。尤其在高速压缩下，推进剂产生“喇叭”状形貌且微裂纹沿四周分布，表面宏观破坏由近表面颗粒与基体界面处微裂纹扩展传播所致。研究还发现，微裂纹的传播与填充颗粒的空间位置相关，在动态压缩载荷作用下，微裂纹存在横向和轴向两种扩展模式；基体竖直取向微裂纹易发生向水平取向微裂纹的转变，从而导致裂纹闭合。
- 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
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.
- solid propellant /
- in-situ dynamic compression /
- damage rate-related behavior /
- internal damage evolution /
- synchrotron radiation 3D tomography

HTML全文

图 1 基于同步辐射X射线的原位压缩试验示意图

Figure 1. Schematic of in-situ compressive test based on synchrotron radiation X-ray facility

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图 2 固体推进剂原位压缩变形的数据重构过程

Figure 2. The procedure of data reconstruction for in-situ compressive deformation of solid propellant

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图 3 压缩加载下固体推进剂的宏观变形及其内部损伤分布

Figure 3. Macroscopic deformation and internal damage distribution of solid propellants under compressive loading

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图 4 固体推进剂样品在5.0 mm/s压缩载荷作用下的表面损伤

Figure 4. Surface damage of solid propellant sample under compressive loading of 5.0 mm/s

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图 5 固体推进剂微结构示意图和典型损伤及演化行为

Figure 5. Schematic of microstructures and typical damages and evolutionary behaviors of solid propellant

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图 6 不同压缩速率下固体推进剂内部损伤孔隙的变化

Figure 6. The evolution of internal pores of solid propellant at different compressive rates

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图 7 动态压缩下固体推进剂代表性的裂纹扩展模式

Figure 7. Representative crack propagation modes of solid propellant under dynamic compression

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