Hygrothermal Vibration Characteristics of Graphene Platelets-Reinforced Composite Doubly-Curved Panels

In the present article, the vibrational response of a moderately thick doubly-curved panel made of Graphene platelets (GPLs)-reinforced composites is analyzed. The effect of hygrothermal environment on the structure s frequencies is also considered, and it is located on a two-parameter foundation known as Pasternak type. The GPLs are dispersed through the thickness direction of the shell based on different given functions. To determine the effective values of shell s properties, both Halpin-Tsai and extended rule of mixture are employed, and then, using Hamilton s principle for dynamic systems and variational formulation, the governing motion equations are derived. Next, a closed-form solution based on Navier s technique is presented to obtain the natural frequencies and after verifying them with well-known previously published works, the influence of different parameters on them is discussed. The outcomes of this study may be used to design and manufacture more functional engineering structures.