Research on Mesoscale Mechanics of Functional Polymer Compositesfor Highly Reliable Space Deployable Structures

通过实验和微观力学分析，研究了形状记忆聚合物（SMP）复合材料增强功能（形状固定性和形状恢复）的机制，作为应用于空间可展开结构的新型结构材料的潜在候选者。特别是，通过热-机械循环下的展开试验，阐明了纤维结构与展开性能之间的关系，为优化功能的中尺度材料设计提供了基础知识。由于功能与纤维弹性和聚合物的温度依赖特性密切相关，因此从这方面获得的微力学机制也通过热力学有限元分析得到澄清。

The present study investigated the mechanism for enhancing the functionality (shape fixity and shape recovery) of shape memory polymer (SMP) composites, as potential candidates for new structural materials applied to space deployable structures, using experiments and micromechanical analyses. Especially, through deployment tests under a thermomechanical cycle, the relationship between fiber architecture and deploymentperformance was clarified, and basic knowledge was obtained for mesoscale material design of optimal functionality. Since the functionality is closely related to fiber elasticity and temperature-dependent characteristics of the polymer, the micromechanical mechanism gained from the aspect was also clarified using thermomechanical finite element analyses.