在星际探索期间评估太空结构中的粘接接头的长期性能
Gabin Charpentier1,2, Ugo Lafont3, Sofia Teixeira de Freitas1
1Department of Aerospace Structures and Materials, Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands.
Materials (Basel, Switzerland)
|July 29, 2023
概括
可重复使用的航天器面临着增加的机械应力. 本研究研究了电子辐射和热真空循环如何影响两种常见的航天器粘合剂,评估它们在太空应用中的长期耐用性.
科学领域:
- 材料科学 材料科学 材料科学
- 航空航天工程 航空航天工程
- 粘附科学 粘附科学 粘附科学
背景情况:
- 为星际探索和重复着陆而设计的可重复使用的航天器将经历更大的机械负载.
- 太空环境对航天器结构中使用的粘合材料的长期影响尚未完全理解.
- 粘合剂对于航天器组装至关重要,它们的性能退化会影响结构完整性和任务寿命.
研究的目的:
- 为了研究两种广泛使用的航天器粘合剂的老化行为:Scotch-WeldTM EC-2216和Scotch-WeldTM EC-9323-2.
- 评估高能电子辐射和热真空循环对粘合性能和粘合力的影响.
- 评估这些粘合剂在与碳纤维增强聚合物 (CFRP) 和基板结合时的性能.
主要方法:
- 粘合剂经历了两种老化条件:高能电子辐射和热真空循环.
- 进行了拉伸测试,剥离测试和双杆束 (DCB) 测试,以评估附着强度和断裂性.
- 动态机械分析 (DMA) 用于描述老化的粘合剂的内在粘弹性特性.
主要成果:
- 该研究量化了暴露于模拟空间环境条件后的粘合性能和对CFRP和的粘附变化.
- 电子辐射和热循环导致两种粘合剂的机械性能有可测量的降解.
- 在不同的老化场景下,确定了每个粘合剂和基板组合的特定故障模式和性能演变.
结论:
- 这些发现提供了关于常见航天器粘合剂在太空环境压力因素下的长期耐用性的关键数据.
- 了解粘合剂老化对于设计可靠和可重复使用的航天器来进行延长的行星间任务至关重要.
- 这项研究为材料选择提供了信息,并预测了未来太空探索车辆中粘合剂接头的使用寿命.
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