Elastic wave characteristics in damped laminated composite nano-scaled shells with different panel shapes

摘要

Characteristics of elastic mechanical waves in cross/angle-ply laminated composite doubly-curved nanoshells resting on a viscoelastic foundation are examined here. A higher-order refined shear deformation shell theory enriched by general nonlocal strain gradient elasticity accounting both nonlocality as well as strain gradient size-dependency is developed through assumptions of Hamiltonian principle, and afterward, a harmonic solution producer is handled with equations of motion to find the responses. As a first endeavor, the influences of lay-up numbers and sequences, fiber orientations of constituent layers, elastic and viscoelastic foundation coefficients, as well as wave number on the elastic wave propagation characteristic of a laminated composite nanoshell including cylindrical, spherical, hyperbolic, and elliptical shell panels substantially are examined.