This paper presents two methods to design cutouts that allow damage-free folding of the stiffest possible composite self-deployable thin shell structures of complex shapes. The first method uses level-set functions that define a general number of cutouts. The second method uses a spline representation of the contour of a single cutout and optimizes its shape. Material failure detection is implemented in the solution. Both methods are applied to the design of deployable thin shells forming 90° joints, and multiple viable solutions are obtained. Experiments on the best performing design, a $90–390\mu \mathrm{m}$ thick shell made of Astroquartz with a cyanate ester matrix, with five cutouts on each side, are presented to illustrate and validate the proposed approach.

本文提出了两种设计切口的方法，这些切口可以使最复杂的形状可能最坚硬的复合自展开薄壳结构无损折叠。第一种方法使用级别设置功能，这些功能定义了常规的切口数。第二种方法使用样条线表示单个切口的轮廓，并优化其形状。解决方案中实现了材料故障检测。两种方法都用于设计形成90°接头的可展开薄壳，并获得了多种可行的解决方案。对性能最佳的设计进行实验，$90–390\mu \mathrm{米}$ 提出了一种由Astroquartz制成的带有氰酸酯基体的厚壳，每侧各有五个切口，以说明和验证所提出的方法。