on bending response of doubly curved laminated composite shells using hybrid refined models

This paper presents a static analysis of laminated composite doubly-curved shells using refined kinematic models with polynomial and non-polynomial functions recently introduced in the literature. to be specific, maclaurin, trigonometric, exponential and zig-zag functions are employed. the employed refined models are based on the equivalent single layer theories. a simply supported shell is subjected to different mechanical loads, specifically: bi-sinusoidal, uniform, patch, hydrostatic pressure and point load. the governing equations are derived from the principle of virtual displacement and solved via navier-type closed form solutions. the results are compared with results from layer-wise solutions and different higher order shear deformation theories available. it is shown that refined models with non-polynomial terms are able to accurately predict the through-thethickness displacement and stress distributions maintaining less computational effort compared to a layer-wise models.