Cutting holes in bistable folds

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 surrounding material and leads loss of bistability when hole dimensions reach critical size. These are strongly anisotropic feature surprising re-entrant behavior, such that removal additional re-stabilize state. model surface wide annular developable strip found capture qualitative observations experiments simulations. phenomena consequential mechanics design crumpled sheets, surfaces, origami kirigami, other deployable compliant structures.