Work

Analysis of a 3D Bistable Programmable Metamaterial Mechanism

Year: 2026

Type: article

Abstract: Programmable metamaterials are designed to tailor mechanical properties and stable configurations through the selection of geometric and material parameters. Here, a two-dimensional auxetic unit is combined with a bistable unit to create a three-dimensional metamaterial mechanism with tunable bistable behaviour. The rotating-triangle architecture of the auxetic unit has a Poisson’s ratio of −1, while the second stable state is governed by the geometry and relative bond stiffnesses of the two units. Bistability occurs when ka/kb<1.25, where ka and kb are the bond stiffnesses of the auxetic and bistable units, respectively. The design parameters determine the second stable state and, in turn, the mechanism’s effective properties. The symmetry of the base cell enables its periodic repetition to form a three-dimensional metamaterial lattice.

Source: Symmetry

DOI: 10.3390/sym18111871

Authors: Ioannis Dachis, Evangelos P. Hadjigeorgiou, Konstantinos G. Beltsios

Institutions: University of Ioannina, National Technical University of Athens

Language: English

Topic: Cellular and Composite Structures

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,896

OpenAlex ID: W7225662841

FWCI:

Cites: 21

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