Developments of folding/deploying techniques of membrane structures and their applications to aerospace engineerings

设计了各种可折叠/可展开的折纸类型结构。它们是可折叠圆柱体、圆锥壳、圆形膜和抛物面膜。此外，还设计了三维蜂窝芯材的基本模型和用平板制作的海绵芯材模型。折纸模型不仅可用于设计可展开的航空结构，还可用于设计可折叠的商业产品，如PET瓶、罐和其他工程产品。在这个设计过程中，由梯形元素组成的图案是首选的，因为它具有更丰富的可展开性和更简单的折痕。它们可以用目前的生产技术来制造。可折叠的产品以及轻质、坚硬的芯子将促进这些产品的重复使用，从而减少产生的垃圾数量。为了实现这一点，尽管作者已经开发了一种灵活的金属工具，通过一次操作就可以在平板上引入许多折痕，但折痕技术的进一步发展仍然是必要的。这里提出的解析折纸方法可能有助于在解释塑料屈曲、仿生机器人建模、用于教育或教育娱乐的可移动折纸建模以及新的功能设计方面的学术进展。此外，预计它们将带来对仿生力学的新解释。事实上，作者设想形成一门新的折纸工程学科。

Various kinds of foldable/deployable origami type structures were devised. They are foldable cylinders, conical shells, circular membranes and parabolic membranes. In addition, fundamental models of 3-D honeycomb cores and sponge core models made using a flat sheet were devised. The origami models can be applied not only to design deployable aerospace structures but to design foldable commercial products such as PET bottles, cans and other engineering products. In this design process, patterns consisting of trapezoidal elements are preferred because of richer deployabilities and simpler creasing. They can be manufactured with current production technology. Foldable products as well as light, rigid cores will promote re-use of these products and so reduce the amount of rubbish produced. To achieve this, although the author has developed a flexible metal tool to introduce many creases in a flat sheet by a single operation, further developments for creasing technology are still necessary.The analytical origami approaches presented here may facilitate academic progress in the interpretation of plastic buckling, biomimetic robotic modelings, movable origami modeling for education or edutainment and new functional designs. Furthermore, it is expected that they will bring new interpretations of bionic mechanics. Indeed, the author envisages the formation of a new origami engineering discipline.