论文标题
割孔
Cutting holes in bistable folds
论文作者
论文摘要
折叠的磁盘是可动的，因为它可以弹出到倒置状态，其弹性能量位于折叠的小型，高度变形的区域。切除这种奇异性会放松周围的材料，并在孔尺寸达到临界大小时导致双重性丧失。这些维度强烈各向异性，并具有令人惊讶的重点行为，因此去除其他材料可以重新稳定倒置状态。发现表面作为宽环形开发带的模型可捕获实验和模拟中的定性观测。这些现象对皱巴巴的弹性纸，可开发表面，折纸和基里加米以及其他可部署和兼容的结构的机械和设计造成了影响。
A folded disk is bistable, as it can be popped through to an inverted state with elastic energy localized in a small, highly-deformed region on the fold. Cutting out this singularity relaxes the surrounding material and leads to a loss of bistability when the hole dimensions reach a critical size. These dimensions are strongly anisotropic and feature a surprising re-entrant behavior, such that removal of additional material can re-stabilize the inverted state. A model of the surface as a wide annular developable strip is found to capture the qualitative observations in experiments and simulations. These phenomena are consequential to the mechanics and design of crumpled elastic sheets, developable surfaces, origami and kirigami, and other deployable and compliant structures.
