Symmetric SPH modeling of functionally graded nanocomposite plates subjected to low‐velocity impact.

Functionally graded (FG) composites reinforced by carbon nanotubes (CNTs) have received extensive attention due to their excellent mechanical properties. The impact responses of FG‐CNT nanocomposites are analyzed by the developed meshless method. The temperature‐dependent material properties are expressed by way of the extended rule of mixture. The kinematics of the composite plate is established on the basis of the first‐order shear deformation theory. The modified Hertzian contact law is adopted to evaluate the impact loading between the plate and the impactor. The dynamic balance equations of the plate are constructed and computed by the Systemic Smoothed Particle Hydrodynamics (SSPH) method with strengthened prediction ability. The impacting behaviors of the FG‐CNT nanocomposite plate, as well as the parametric effects, are analyzed by the developed model and the suitability is clearly demonstrated. Highlights: Impact of FG‐CNTRC is firstly solved by a self‐developed meshless SPH model.Strong capacity of the SPH impact model is clearly demonstrated.More CNTs close to the strike face would improve the impact resistance. [ABSTRACT FROM AUTHOR]