Two-dimensional Mechanical Metamaterials with Unusual Poisson Ratio Behavior

Abstract

We design two-dimensional (2D) mechanical metamaterials that may be deformed substantially at little or no energy cost. Examples of such deformable structures are assemblies of rigid isosceles triangles hinged in their corners on the macro-scale, or polymerized phenanthrene molecules forming porous graphene on the nano-scale. In these and in a large class of related structures, the Poisson ratio $\nu$ diverges for particular strain values. $\nu$ also changes its magnitude and sign, and displays a shape memory effect.

Accepted by Phys. Rev. Applied 10 (2018)

References in corpus (4)

• Magic-angle graphene superlattices: a new platform for unconventional superconductivity
• Bottom up synthesis of multifunctional nanoporous graphene
• Buckling-Induced Kirigami
• Novel Two-Dimensional Silicon Dioxide with in-plane Negative Poisson's Ratio

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