Lightweight rigidly foldable canopy using composite materials
Lightweight rigidly foldable canopy using composite materials
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DOI：
10.1007/s42452-020-03846-0
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发表时间：
2020-11-12
影响因子：
2.6
通讯作者：
Tachi, Tomohiro
中科院分区：
文献类型：
--
作者：
Ando, Kensuke;Izumi, Bunji;Tachi, Tomohiro
本文提出了一种新的折纸为基础的便携式可展开的篷系统，采用纤维增强塑料。提出了一种由多个可展开条组成的模块化系统，以提供从平折状态到完全展开状态的单自由度展开运动。每个条带由具有嵌入式柔性铰链的面板组成，其图案通过预浸复合片材的铺设和多步固化而在平面配置中产生。本文演示了使用该系统的座舱盖设计过程。为了捕捉复杂的行为和功能，设计过程涉及为每个步骤开发不同的分析模型，从简化模型开始，到细化模型结束。在这种情况下，我们从刚性折纸理论定义了一个参数化设计族，并通过多目标优化（MOO）方案确定了初步设计参数，以平衡性能和制造约束。然后，我们应用几何非线性分析，以评估折叠行动的运动学行为，也在其部署状态下的结构的屈曲行为。分析表明，需要使用张力元件来改善稳定性。该结构被分成可展开的部分，可以在平面状态下制造。该系统的总质量为27公斤，可由两到三人携带，并在一分钟内部署。
This paper presents a novel origami-based portable deployable canopy system developed using fiber reinforced plastics. A modular system composed of multiple developable strips is proposed to provide a one degree-of-freedom deployment motion from a flat-folded state to a fully deployed state. Each strip is comprised of panels with embedded compliant hinges whose pattern is created in a planar configuration through the laying out of prepreg composite sheets and multi-step curing. The design process of a canopy using this system is demonstrated herein. To capture the complex behaviors and functionality, the design process involves developing different analytical models for each step starting with a simplified model and ending with a refined model. In this case, we defined a parametric design family from rigid origami theory and determined preliminary design parameters through a multi-objective optimization (MOO) scheme in order to balance performance against manufacturing constraints. We then applied geometric nonlinear analyses to assess the kinematic behaviors of the folding actions and also the buckling behavior of the structure in its deployed state. The analyses indicated the need for stability improvement, provided using tension elements. The structure was divided into developable parts that can be manufactured in a planar state. With a total mass of 27 kg, the system can be carried by two or three persons and deployed within a minute.