The Analysis Of Dynamic Response And Damage Of Bird Strike Against Composite Laminates

With the increasing application of composite materials in aerospace,the bird strike problem of composite laminates has attracted more and more attention. Solving this problem has a significant meaning for avoiding the vital accidents and loss brought by bird strike. Currently, experts and scholars have done some research in this field from four aspects: theoretical analysis, experimental study, numerical simulation and design specification.This paper summarizes the history of bird strike problem and the research status of composite laminates under bird strike at home and abroad; discusses the related theories about bird strike problem, including the laminates strength theory, bird strike dynamic theory and the application of ANSYS/LS-DYNA in solving the problem; discusses the strike load, bird model, in detail, including the load simulation method, coupling method, bird constitutive model and the bird shape and so on, and the established bird model is verified, proving its rationality; also the coupling model of composite laminates under bird strike is built, and the dynamic response and damage are discussed in detail, including the impact process and deformation, contact pressure on the laminates, energy change during the strike, and the damage propagation of the laminates; finally, according to the energy change of the bird and the contact pressure value of the laminates, influencing factors of the bird impact resistant capacity of the laminates is analyzed, mainly including the laminate material, ply style, bird material, and the bird speed.This study can provide theoretical support for the anti-strike design of the composite laminates and the bird strike test.