Dynamic response of a composite reinforced panel to bird Strike

A contact-impact coupled algorithm was applied to study anti-bird strike characteristics of a composite reinforced panel taking impact damage of composite honeycomb core material into account. Bird strike modes included vertical impact and oblique one. Chang-Chang model was used to simulate the impact damage of composite material. Variation rules of characteristic parameters, such as, damage element number of composite panel, residual kinetic energy of bird body and deformation of stiffener under three kinds of bird velocities, as well as stresses of composite panel and stiffener with change in stiffener number under one kind of bird velocity, were analyzed. The computing results showed that characteristics of bird strike under vertical impact and oblique one are different; anti-bird strike characteristics may not be improved when stiffener number increases, sometimes stiffeners are too many to enhance the anti-bird strike characteristics.