Nonlinear low-velocity impact response of GRC beam with geometric imperfection under thermo-electro-mechanical loads

This paper presents an investigation on thermo-electro-mechanical nonlinear low-velocity impact behaviors of the geometrically imperfect functionally graded (FG) graphene-reinforced composite (GRC) beam with surface-bonded piezoelectric layers. Both uniformly distributed and FG patterns graphene nanoplatelets (GPLs) are considered along thickness GRC host beam. The effective Young’s modulus is calculated by Halpin–Tsai model. Poisson ratio mass density rule mixture. modified Hertz contact law employed to predict force between spherical impactor during impacting. By considering first-order shear deformation theory von Kármán displacement–strain relationship, governing equations obtained Hamilton principle dispersed differential quadrature (DQ) method. Newmark-? method associated Newton–Raphson iterative process adopted parametrically identify dynamic response system. effects geometric imperfection, weight fraction distribution pattern GPLs, temperature variation, layer impactor’s initial velocity beams discussed in detail. Our results illustrate that coupling effect imperfection load has a significant behavior beam, GPLs distributing into layers better for reducing