2604.01241 Mechanical Metamaterials with Programmable Poisson's Ratio from -0.8 to +0.5 via Bistable Unit Cell Switching: Design and Experimental Validation
We report a systematic investigation of mechanical metamaterials with quantitative characterization spanning multiple length scales and operating regimes. Our methodology combines first-principles theoretical analysis, finite-element numerical simulations, and experimental measurements on fabricated samples to establish precise performance boundaries.