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- W2786709901 abstract "Nowadays, the study of the direct effects of lightning on aeronautical structures could be based, at least in part, on simulation tools. Nevertheless, the lack of experimental data on the transient phase of the lightning arc does not allow us to justify the predictive nature of the simulation tools. The objective of this thesis is to produce an experimental database based on the characterization of lightning arcs in standardized situations. These data can be used both for the understanding of the phenomena observed during the tests, but especially as a reference comparable to the simulation tools. First, we are interested in the free arc column in air, without interaction with the electrodes. Furthermore, time- and space-resolved profiles of temperature and pressure are evaluated by emission spectroscopy. For a 100 kA arc, it is shown that the temperature reaches 37400 K in the arc axis at 2 μs after arc ignition, with a corresponding pressure of 45 bar. Second, we are interested in the interaction of the lightning arc with aeronautical materials. The dynamics of the arc roots and the characteristics of the shock wave are analyzed for different aeronautical materials such as aluminum or carbon fiber composites. The thermo-mechanical constraints applied on the material are studied by infrared thermography and by rapid deflection measurements at the center of panel, leading to an evaluation of the pressure exercised by the arc at the attachment point." @default.
- W2786709901 created "2018-02-23" @default.
- W2786709901 creator A5007078134 @default.
- W2786709901 date "2016-11-15" @default.
- W2786709901 modified "2023-09-23" @default.
- W2786709901 title "Experimental and theoretical studies of lightning arcs and their interaction with aeronautical materials" @default.
- W2786709901 hasPublicationYear "2016" @default.
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