对热老化复合材料改性双基推进剂的延长主曲线的研究
Jian Zheng1, Jiaming Liu2, Heng Deng3
1School of Mechanical Engineering, Key Laboratory of Special Engine Technology, Ministry of Education, Nanjing University of Science and Technology, Nanjing, 210094, PR China. zhengjian@njust.edu.cn.
Scientific reports
|July 6, 2025
概括
复合改性双基 (CMDB) 推进剂的最大延长度随着时间的老化而降低,显示出微观损伤的增加. 延长主曲线模型在各种老化条件下准确预测这种行为.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 固体力学 固体力学是什么
背景情况:
- 复合改性双基 (CMDB) 推进剂是关键的能量材料.
- 了解它们在各种环境条件下的长期性能对于安全性和可靠性至关重要.
- 老化显著影响推进剂的机械性能,需要预测模型.
研究的目的:
- 为了预测CMDB推进剂在不同的老化时间,温度和应变速率下的最大延长.
- 建立一个延长主曲线模型,将衰老的影响纳入其中.
- 分析CMDB推进剂的衰老机制.
主要方法:
- 在六个温度 (233.15 K至323.15 K) 和三种应变速率 (3.3 × 10−4 s−1至3.3 × 10−2 s−1) 的系统的单轴拉伸特性.
- 采用了加速衰老的协议.
- 扫描电子显微镜 (SEM) 用于分析微观损伤.
- 根据时间-温度等效原理构建延长主曲线.
主要成果:
- 随着时间的老化,CMDB推进剂的最大延长率单调地减少.
- 拉伸部分的微观损伤随着年龄的增长而增加.
- 老化时间对温度和速度依赖性质的影响最小.
- 开发的延长主曲线模型准确地描述了不同老化时间下的延长行为.
结论:
- CMDB推进剂的最大延长对老化时间敏感,随着时间的推移观察到降解.
- 已建立的延长主曲线模型有效地预测了推进剂的行为,考虑到老化效应.
- 这些发现为评估CMDB推进剂的长期性能和预测CMDB推进剂的使用寿命提供了有价值的工具.
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