Free Vibration and Tension-Bending Coupling Behaviors of Sandwich Panels with Novel Tri-Chi Honeycomb

The triangular chiral honeycomb is inspired by the anti-tetra chiral design and consists of fully triangular cells, which is a novel structure that exhibits a negative Poisson’s ratio. In this study, the effective plate properties of sandwich panels with triangular chiral honeycombs (SP-TCH) are evaluated using the variational asymptotic method. Based on this, a two-dimensional reduced-order plate model (2D-RPM) is developed. The accuracy and effectiveness of the 2D-RPM is verified by comparing its analysis of the tension-bending coupling and free vibration of SP-TCH against 3D finite element (FE) model results.