Buckling and free vibration analysis of doubly‐curved sandwich shells with architected tetrachiral core under thermal effects

Abstract This work examines the buckling behavior of three‐layered doubly‐curved sandwich shell constructions featuring an architected tetrachiral core subjected to thermal loading. The surface of the sandwich construction consists of a mixture of metal and ceramic elements, whereas the core is constructed from a tetrachiral lattice configuration. The analysis examines the impact of temperature effects, geometric characteristics of the tetrachiral core, and curvature radii on structural stability. The sinusoidal shear deformation theory is utilized to more precisely account for shear deformation effects, and the governing equations of motion are generated by the Navier's solution method. The validity of the present formulation was confirmed through close agreement with reference solutions available in the literature, ensuring the accuracy of the developed analytical model. The results indicate the crucial influence of core architecture and thermal conditions on the buckling behavior of advanced composite shell constructions. This study presents innovative perspectives on the design and evaluation of sandwich structures using architected cores and contributes significantly to the current body of knowledge.