A jigsaw puzzle metamaterial concept
V. Ne\v{z}erka (1), M. Somr (1), T. Janda (1), J. Vorel (1), M., Do\v{s}k\'a\v{r} (1), J. Anto\v{s} (1), J. Zeman (1), J. Nov\'ak (1) ((1), Faculty of Civil Engineering, Czech Technical University in Prague)
TL;DR
This paper introduces a modular mechanical metamaterial inspired by jigsaw puzzles, where tile rotation and design enable tunable elastic properties and reassembly, validated through experiments and optimization techniques.
Contribution
It presents a novel jigsaw puzzle-inspired metamaterial concept with reconfigurable properties and a design methodology validated by experiments and finite element optimization.
Findings
Assembly properties can be precisely designed using optimization.
The metamaterial exhibits a range of elastic behaviors, including negative Poisson's ratio.
Experimental results confirm the effectiveness of the design approach.
Abstract
A concept of a planar modular mechanical metamaterial inspired by the nature's principle of local adaptivity is proposed. The metamaterial consists of identical pieces similar to jigsaw puzzle tiles. Their rotation within assembly provides a substantial flexibility in terms of structural behavior and mechanical interlocks enable reassembly. The tile design with a diagonal elliptical opening allows us to vary elastic properties--from stiff to compliant, with positive, zero, or negative Poisson's ratio. The outcomes of experimental testing on additively manufactured specimens confirm that the assembly properties can be accurately designed using optimization approaches with finite element analysis at heart.
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