Numerical and experimental characterization of 3D-Printed elliptical anti-chiral metamaterials with box-Behnken optimization

In recent years, progress in architected lattices and high-resolution vat photopolymerization has renewed attention to auxetic designs that combine conformability with load-bearing capacity. Here, the mechanics of Digital Light Processing (DLP)-printed elliptical anti-chiral metamaterials were examined with the aim of establishing practical design rules for stiffness, energy absorption, peak load, and auxetic response. A Box-Behnken design was implemented over three geometric factors (curvature, thickness, width), and an elastic-plastic finite-element model calibrated from compression tests was validated against tests on representative lattices. ANOVA confirmed statistically significant models for all…