| C/SiC材料在模拟空天往返条件下的可重复使用性能评估 |
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| 引用本文： | 谭志勇,王捷冰,张毅,李彦斌,徐聪.C/SiC材料在模拟空天往返条件下的可重复使用性能评估[J].宇航学报,2021,42(12):1590-1599. |
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| 作者姓名： | 谭志勇 王捷冰 张毅 李彦斌 徐聪 |
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| 作者单位： | 1.空间物理重点实验室，北京 100076；2.西北工业大学材料学院，西安 710072；3. 东南大学机械工程学院，南京 211189 |
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| 基金项目： | 国家自然科学基金（U20B2002, 11802059, 52175220）；国防技术基础科研项目（JSZL2019203B003）；江苏省自然科学基金（BK20211558）；东南大学“至善青年学者”支持计划（4302002156） |
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| 摘 要： | 针对飞行器空天往返、多次使用的发展需求，以2D C/SiC材料为对象，选择开放大气模拟环境、800 ℃温度条件开展了常/高温拉伸试验、以及常温→高温→降温循环变化历程下拉-拉疲劳的耦合试验，得到不同的力学性能规律，分析了影响材料表面涂层完整性的控制因素及转化点。表明C/SiC材料具有优良的高温静态持续强度性能，但在常-高温循环变化历程下的疲劳性能明显衰减。采用剩余刚度衰减模型，提出了力-热-氧耦合时考虑常-高温循环历程影响因素、以及氧化尺寸效应影响的疲劳剩余性能评估方法。
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| 关 键 词： | C/SiC复合材料 模拟环境 疲劳试验 损伤演化 寿命预测 |
| 收稿时间： | 2021-05-08 |
Assessment on Repeatable Mechanical Character of C/SiC Material under the Condition of Simulated Space Shuttle |
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| TAN Zhi yong,WANG Jie bing,ZHANG Yi,LI Yan bin,XU Cong.Assessment on Repeatable Mechanical Character of C/SiC Material under the Condition of Simulated Space Shuttle[J].Journal of Astronautics,2021,42(12):1590-1599. |
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| Authors: | TAN Zhi yong WANG Jie bing ZHANG Yi LI Yan bin XU Cong |
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| Affiliation: | 1. Science and Technology on Space Physics Laboratory, Beijing 100076, China; 2. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi ’an 710072, China; 3. School of Mechanical Engineering, Southeast University, Nanjing 211189, China |
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| Abstract: | Aimed at the development requirement and repeatable use in space shuttle, the tensile tests in the oxidation simulation environment of open atmosphere with room temperature and 800 ℃ are proposed for the 2D C/SiC composite material. The coupling test by room temperature high temperature room temperature cycle process with tension tension fatigue load is done. The regulation of mechanical character in different conditions is obtained. The control factor affecting the integrality of surface coating for C/SiC specimen and the translating point are analyzed. A fine static durative strength character is shown for the material in high temperature environment, but the fatigue character is declined evidently during the process of cycling. Based on the model of residual stiffness, a new modified fatigue life prediction method is given fitted for mechanical thermal oxidation coupling condition, in which the factor of cycling process from normal to high temperature and the dimensional size factor affecting the sample’s oxidation are considered. |
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| Keywords: | C/SiC composites Simulated environment Fatigue test Damage evolution Life prediction |
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