Numerical bird strike impact simulation of aircraft composite structure

Abstract

Verbatim from Semantic Scholar. Not paraphrased, not summarized.

The work presented in this paper deals with application of explicit finite element analysis in order to predict the bird-strike induced impact damage on fuselage part of typical transport aircraft. A methodology has been developed to support the bird-strike certification of the metallic materials made with aluminum alloy2024-T4, 7075-T6. The numerically explicit LS-DYNA codes were used to simulate the arbitray Lagrangian Euler (ALE) bird model. An important part of the bird strike modeling procedure is the application of a bird replacement material with constitutive response which replicates the forces induced by an impact of a real bird. The bird material is modelled by an equation of state, with properties that match the pressure–density relations of water and air mixtures. The input parameters for the simulation have been selected as to simulate a bird strike used to verify the compliance with damage tolerance certification requirements. The ability of this work is leading to improved design efficiency and safety, while significantly reducing certification cost. KeywordsBird Strike, Certification. Aluminum Alloy Structures, Explicit Analysis LS-DYNA, Structural Impact.

Author

• Nagaraj

Keywords

• Engineering
• Materials Science