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Communication Dans Un Congrès Année : 2023

3D modeling of an arc in interaction with a composite panel

Résumé

During the lightning strike on an aircraft and particularly in the pulsed arc phase, the current can reach values in the range of 200 kA during microsecond timescale. The direct effect of such arcs on structures can be quite severe depending on the material being used. This effect is even more troublesome on new composite materials used in modern airplane such as such as multilayer CFRP (Carbon Fiber Reinforced Polymer). Indeed, due to the highly anisotropic properties of CFRP composites, the electrical conductivity of composites is not scalar as in metallic materials but is generally tensorial. In a multilayer CFRP, each layer exhibits an electrical conductivity at least two order of magnitude higher in the direction of the fibers than in the direction perpendicular to it. Moreover, the different layers have different orientations of the fibers, and the transverse conductivity between them may be three or four orders of magnitude lower than the conductivity of the fibers. For the numerical study of an arc in the pulsed phase interacting with CFRP composite materials then requires to perform 3D simulations. After the presentation of the MHD code Taranis and the anisotropic mesh refinement code feflo.a, the new Taranis/feflo.a framework will be used to carry out a 3D numerical study showing the effect of the tensorial electrical conductivity of a composite on the dynamics of an arc in the pulsed phase. The simulation results will then be compared with experimental results.
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hal-04401291 , version 1 (17-06-2024)

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François Pechereau, Fabien Tholin, Julien Vanharen, Guillaume Puigt, Frédéric Alauzet, et al.. 3D modeling of an arc in interaction with a composite panel. Aerospace Europ Conference - 10th EUCASS - 9th CEAS Conference, Jul 2023, Lausanne, Switzerland. ⟨10.13009/EUCASS2023-701⟩. ⟨hal-04401291⟩
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