Fiber reinforced shape memory polymer composites and their applications in aerospace
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摘要: 形状记忆聚合物(SMP)是一种能够保持临时形状,并在外界刺激下自发回复到其初始形状的智能材料,具有高形状固定率、高形状回复率、转变温度可调、变形能力强、质量轻等优点,但其应用受到响应方式单一和承载能力差的限制,通过向聚合物中添加功能颗粒或增强纤维制成形状记忆聚合物复合材料(SMPC),可有效解决这一问题。首先介绍了SMP形状记忆效应的原理,然后阐述了纤维增强型SMPC有限变形过程中纤维的微屈曲行为。最后对可变形结构在航天领域的应用进行了论述。
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关键词:
- 形状记忆聚合物复合材料 /
- 纤维 /
- 后屈曲 /
- 可变形结构 /
- 航天应用
Abstract: Shape memory polymer (SMP) is a kind of smart materials that can maintain a temporary shape and recover its initial configuration under external stimuli. Its advantages of high shape fixation rate, high shape recovery rate, adjustable transition temperature, high deformation ability and light weight makes it suitable to design and fabricate deformable structures. However, its application is restricted by limited response modes and poor bearing capacity. These problems can be effectively solved by adding functional particles or enhanced fibers to the polymer matrix to obtain shape memory polymer composites (SMPC). This article first introduces the shape memory mechanism of SMP and gives its actuation methods. Then, fiber microbuckling behavior of unidirectional fiber reinforced SMPC is discussed. Finally, applications of deformable structures in aerospace are presented. -
图 17 搭载SJ20同步卫星的可展开柔性太阳能电池阵列系统(SMPC-FSAS) 2020年1月5日在轨展开过程: (a), (b)解锁过程; (c)–(f)展开过程[55]
Figure 17. On-orbit releasing and deployment demonstration of SMPC-FSAS flight hardware which was performed on SJ20 Geostationary Satellite on 5 Jan., 2020: (a), (b) Unlocking process in space; (c)–(f) Deploying process in space[55]
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