Origami metamaterials provide a versatile framework for finely tuning mechanical properties through intricate folding arrangements. This seminar unveils two novel experimental setups tailored for probing Poisson effects in deployable metamaterials and delve into the mechanics of Kresling tubes.

The first setup focuses on assessing Poisson's ratio across diverse origami patterns: the standard Miura-ori, Eggbox, the newly devised Morph, and Trimorph pattern. Notably, our investigations showcase the unique capability of Morph pattern to reverse Poisson's ratio sign and exhibit entirely positive or negative values via topological transformations. Our comprehensive analysis, integrating theoretical predictions, simulations, and experimental data, underscores the remarkable tunability of Poisson's ratio in origami metamaterials, solidifying the alignment across these domains.

The second setup is dedicated to unraveling the mechanical intricacies of Kresling tubes, comprising even and odd numbers of Kresling units with both similar and dissimilar chirality. This setup features two fixtures enabling independent control of axial displacement (contraction/expansion) and twist, without imposing constraints on the chiral arrangement of individual cells within the Kresling origami array. The fundamental nature of this work makes it applicable to several fields of engineering, including soft robotics and mechanical computing.