Keywords: applied mathematics, numerical simulation, aeronautics, transient dynamics, composite, avian impact, experimentation, nonlinear analysis.

This study concerns the development of an aeronautical structure reinforced against avian shock. The objective of the work carried out is to define and characterise an innovative concept of absorbent composite material. In order to make the mechanical characteristics of the structure more reliable and optimise them during high-energy impacts, work is performed to develop an experimental study methodology and a numerical simulation model. The objective of the simulation is to have a predictive tool validated by correlation with real tests. The lack of knowledge of the non-linear behaviour of the composite material at high deformation and at different speeds, as well as of the damage and failure mechanisms, are obstacles to the development of the concept. The lack of a dedicated experimental matrix presents a difficulty for the characterisation and sizing of the absorbent material. The work focuses on the study of the mathematical, mechanical, numerical and computer aspects of the problem. The three components of the study, i.e. the bird, the absorbent material at the scale of a specimen and the concept of the bulkhead are studied. For this purpose, different application cases are carried out. After the development of experimental studies, the new concept is validated by correlation with a numerical simulation methodology. The results of the study highlight the analysis and development of an interesting concept. This project also includes two complementary studies concerning other critical aeronautical impact cases: multiple impact of hailstones and tyre debris. These cases are considered following the lessons learned from the previously conducted study.

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