Slit-snapping and multistability in buckled beams with partial cuts
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| Format: | Preprint |
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2025
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| _version_ | 1866909779031490560 |
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| author | Faulí, Bernat Durà Kwakernaak, Lennard van Hecke, Martin |
| author_facet | Faulí, Bernat Durà Kwakernaak, Lennard van Hecke, Martin |
| contents | Elastic instabilities such as buckling and snapping have evolved into a powerful design principle, enabling memory, sequential shape morphing, and computing in metamaterials and devices. Modifying the post-buckling configurations or their snapping transitions would greatly expand design possibilities, yet general principles for controlling elastic instabilities are lacking. Here, we show that adding a partial cut, or slit, to a flexible beam enables precise control of post-buckling behavior: under compression, slit-beams first buckle, then snap, leading to trista-bility within the hysteretic regime. A truss model explains these phenomena by uncovering the interplay of geometric and slit induced nonlinearities. Leveraging these insights, we realize multi-slit beams with programmable behavior, unlocking a vast design space featuring giant hysteresis, quadstability, multi-step snapping, tristability at zero compression, and compression-induced snapping between left and right-buckled states. Our strategy is general, simple to design and implement, and enables mechanical metamaterials and devices with advanced memory and sequential behavior. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_07696 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Slit-snapping and multistability in buckled beams with partial cuts Faulí, Bernat Durà Kwakernaak, Lennard van Hecke, Martin Soft Condensed Matter Elastic instabilities such as buckling and snapping have evolved into a powerful design principle, enabling memory, sequential shape morphing, and computing in metamaterials and devices. Modifying the post-buckling configurations or their snapping transitions would greatly expand design possibilities, yet general principles for controlling elastic instabilities are lacking. Here, we show that adding a partial cut, or slit, to a flexible beam enables precise control of post-buckling behavior: under compression, slit-beams first buckle, then snap, leading to trista-bility within the hysteretic regime. A truss model explains these phenomena by uncovering the interplay of geometric and slit induced nonlinearities. Leveraging these insights, we realize multi-slit beams with programmable behavior, unlocking a vast design space featuring giant hysteresis, quadstability, multi-step snapping, tristability at zero compression, and compression-induced snapping between left and right-buckled states. Our strategy is general, simple to design and implement, and enables mechanical metamaterials and devices with advanced memory and sequential behavior. |
| title | Slit-snapping and multistability in buckled beams with partial cuts |
| topic | Soft Condensed Matter |
| url | https://arxiv.org/abs/2509.07696 |