Low-velocity impact response of FG-CNTRC laminated plates with negative Poisson's ratios and clamped boundary conditions

摘要

This paper reports a low-velocity impact response of the functionally graded carbon nanotubes reinforced composite (FG-CNTRC) laminated plates with negative Poisson's ratios (NPR) and clamped boundary conditions. The NPR and functionally graded properties are evaluated for the layers in the thickness direction. Reddy's higher-order shear deformation theory is used to establish the governing equations. The rule of mixture model is used to determine the material properties of FG-CNTRC. The Hertz contact law is used to calculate the contact force. The Newmark's time integration scheme and Newton-Raphson algorithm are used to obtain the low-velocity impact response. The effects of the gradient forms of FG-CNTRC, temperatures, initial impact velocities, plate thickness, and effective Poisson's ratios on the low-velocity impact response of laminated plates are carried out and discussed.