Thermal Buckling and Vibrational Characteristics of Curved Sandwich Nanoplates Featuring Anti‐Trichiral Auxetic Core and Graphene‐Reinforced Foam Surface Layers

Source abstract

ABSTRACT This study presents a rigorous investigation into the thermomechanical vibration characteristics of functionally graded (FG) curved sandwich nanoplates. The novelty of this research lies in the simultaneous evaluation of diverse porosity distributions, graphene reinforcement levels, and curvature configurations within a unified framework that integrates both nonlocal and strain gradient elasticity theories. A parametric numerical approach is employed to elucidate the complex interplay between geometric dimensions, core‐to‐face sheet thickness ratios, and boundary constraints under varying thermal loads. Results demonstrate that graphene platelets act as potent stiffening agents, whereas increasing the metal‐to‐ceramic ratio and temperature leads to significant structural softening and accelerated thermal buckling. Notably, the spatial distribution of porosity (Foam I) is found to be more decisive for vibrational stability than the total void volume. Furthermore, the nonlocal parameter induces a softening effect, while the strain gradient parameter triggers a hardening response, underscoring the sensitivity of nanostructures to scale‐dependent modeling. These findings offer critical design guidelines for high‐performance components in aerospace engineering and nano‐electromechanical systems (NEMS), where maintaining structural integrity under extreme thermal environments is paramount.