Abstract:

An experimental investigation into the arc windshield of a homemade aircraft subjected to bird impact was performed. The critical velocity of the arc windshield , the history curves of displacement and strain of the key point were all obtained. On the basis of the experimental investigation , a finite element model for the full-scale cir-cular arc windshield and the related parts of the aircraft was established. The whole process of bird impact was then numerically simulated using the nonlinear finite-element software LS DYNA3D. A comparison between the wind-shield and the bird in the deformation process and the dynamic history curves of displacement and strain was made ,showing that the experimental results accorded well with the simulated ones. Moreover , the impact force-time curves under different impact velocities were presented. The possible location where failure occurred was finally analyzed.

Key words: bird impact, arc windshield, dynamic response, numerical simulation