Low Porosity Metallic Periodic Structures with Negative Poisson's Ratio

摘要

Auxetic behavior in low porosity metallic structures is demonstrated via a simple system of orthogonal elliptical voids. In this minimal 2D system, the Poissonu27s ratio can be effectively controlled by changing the aspect ratio of the voids. In this way, large negative values of Poissonu27s ratio can be achieved, indicating an effective strategy for designing auxetic structures with desired porosity.