The Damage And Absorbing Energy Of Composite Laminates Under Bird Strike

As the gradually development and mature of design and manufacture of composite material,the composite material is widely used in the filed of aviation.So in the process of research of aircraft,the assessment indicator about the resistance performance of different composite material structure under the bird strike should not be neglected.The current domestic and foreign scholars research the impact damage of composite laminates under the bird impact by means of finite element software and experiment.This paper summarizes the methods and the achievements of bird impact at home and abroad,and analyses the rigid plate hit by a bird using the transient nonlinear software-LS-DYNA with the different methods(Lagrange?ALE?SPH).Based on these methods and software,this paper gives the contrast analysis of simulation and experiment combining the model of bird ?density and the number of SPH,and builds the correct bird model.Based on the correct bird model,this paper builds the model of composite laminates under the bird impact,analyses the influence of the parameter of laminates' plies,surface structure,density,initial velocity and angle of impacting on the absorbing energy of laminates,and analyses the matrix failure and fiber failure process of the plies of composite laminates.Based on the composite laminates under the bird impact,this paper analyses the damage resistance ability of the wing leading by made of composite laminates.On one hand,this paper researches the dynamic response process of three kinds of front wing skins,on the other hand,analyses the damage influence of the skin thickness and the incident angle of bird.Through the above analysis results,the research results can provide the design reference of plane wing leading edge.