提高曲执行器形状记忆聚合物复合材料的可变形性和恢复时刻:多个中性轴皮和可部署核心
Dajeong Kang1, Jae-Moon Jeong1, Kwang Il Jeong1
1Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea.
ACS applied materials & interfaces
|June 26, 2023
概括
这项研究介绍了一种新的三明治结构形状记忆聚合物复合材料 (SMPC) 执行器. 该设计增强了空间应用的可变形性和恢复时刻,实现了创纪录的恢复时刻.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 航空航天工程 航空航天工程
背景情况:
- 形状记忆聚合物复合材料 (SMPC) 由于其轻量级和简单的执行,对太空部署结构具有前景.
- 传统的SMPC执行器面临着由纤维延长和微型结引起的变形和恢复时刻的限制.
研究的目的:
- 设计一种新的三明治结构的SMPC曲执行器,具有增强的可变形性和回收时刻.
- 为了解决空间应用中传统的SMPC执行器的局限性.
主要方法:
- 多重中性轴 (MNA) 皮肤的制造,使用层叠的软 (多甲基烯酸/乙氧化聚乙烯胺) 和硬 (SMPC) 材料.
- 将可部署的核心集成到三明治结构的执行器中.
- 从软层和硬层之间的模量差异中利用MNA效应来管理剪切和轴应变.
主要成果:
- 通过减少SMPC层中的轴应变,MNA皮肤显著增加了执行器的变形性.
- 可部署的核心通过其部署力量增强了恢复时刻.
- 开发的执行器在极小的曲半径 (15毫米) 中实现了世界上最大的宽度正常化恢复矩 (51.2N·m/m).
结论:
- 新型的三明治结构的SMPC曲执行器与MNA皮肤和可部署的核心克服了传统设计的局限性.
- 这种设计提供了卓越的可变形性和回收时刻,使其非常适合用于太空部署结构.
- 取得的性能为SMPC执行器在苛刻的应用中设定了新的基准.
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