Accurate buckling analysis of magneto-electro-elastic cylindrical shells subject to hygro-thermal environments

An accurate buckling model for the magneto-electro-elastic (MEE) composite cylindrical shell under hygro-thermo-magneto-electro-elastic (HTMEE) loads is proposed by consid-ering non-uniform pre-buckling effects. Nonlinear governing equations involving HTMEE multi-physical coupling effects are derived based on the higher-order shear deformation theory (HSDT) and von Karman geometrical nonlinearity. Critical buckling stresses and an-alytical buckling mode for both the axisymmetric and non-axisymmetric buckling are ob-tained by the Galerkin method. In numerical examples, comparisons between theoretical predictions and existing results are presented, and excellent agreements are observed. Spe-cial attention is paid to evaluation of pre-buckling effects on buckling behaviors of HTMEE shells subjected to multi-physical fields. A comprehensive parametric study is performed to reveal effects of key influencing factors on critical buckling stresses and buckling modes. It is believed that present results will be useful for assessing other numerical methodolo-gies and contributing the rapid design of sensors and actuators with HTMEE cylindrical shells. (c) 2023 Elsevier Inc. All rights reserved.