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arXiv · 2609.38365

Geometry and Mechanics of Ribbon Gridshells

Daniel Castro·Joo-Won Hong·Hillel Aharoni·Étienne Reyssat·José Bico·Benoît Roman
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Abstract

Mechanical metamaterials exhibit anomalous properties induced from non-trivial mesoscopic constituents. Inspired from architectural and industrial structures, we introduce arrangements of long, narrow ribbons intersecting at prescribed angles as a model thin-sheet metamaterial. These ribbon gridshells are shown to display highly non-linear behavior driven by the geometric constraints, nonetheless unlike most complex mechanical systems, we are able to explicitly write out the coarse-grained governing equations and to classify their solutions in terms of the intersection patterns of the ribbons. It is shown that the structure can assume arbitrary, tunable Gaussian curvature distributions, allowing us to formulate an inverse design problem, solvable under a suitably defined local condition. An analysis of the soft modes, confirmed by experiment and numerics, reveals rich mechanics which may exhibit both a rigid and an anomalously soft behaviors.

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Daniel Castro, Joo-Won Hong, Hillel Aharoni, Étienne Reyssat, José Bico, Benoît Roman. 2026-10-01. Geometry and Mechanics of Ribbon Gridshells. https://arxiv.org/abs/2609.38365

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