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Electric contacts subject to high currents : Fundamental processes and application to the interaction between lightning and aeronautic structures

Abstract : Lightning is a natural hazardous event that strikes a civil aircraft on average once per 1500 hours of flight. The corresponding high and impulsive currents that may flow along the structure of the aircraft can generate physical constraints with major consequences regarding safety. In particular, when a fastened assembly is crossed by a lightning current, important electric fields and Joule power densities may give birth to a variety of discharge phenomena. The sparking risk is particularly critical in fuel tanks, and different lightning protection technologies and certification procedures are employed to face it. The ignition of discharges is believed to be mostly due to the local electrical resistance at the interfaces between the parts of the assemblies. The aim of this thesis was to model to phenomena that occur at a microscopic scale of such contact resistances subject to high and impulsive currents.
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  • HAL Id : tel-02434636, version 1

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Jean-Baptiste Layly. Electric contacts subject to high currents : Fundamental processes and application to the interaction between lightning and aeronautic structures. Electronics. Université Paris Saclay (COmUE), 2019. English. ⟨NNT : 2019SACLX013⟩. ⟨tel-02434636⟩

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