In situ x-ray phase-contrast imaging of spark erosion of aeronautical fasteners - Archive ouverte HAL Access content directly
Conference Papers Year :

In situ x-ray phase-contrast imaging of spark erosion of aeronautical fasteners

Imagerie par rayons X en contraste de phase de l'étincelage des fixations aéronautiques

(1) , (2) , (2) , (2) , (2) , (2) , (3) , (4) , (2)
1
2
3
4

Abstract

In the context of lightning strike impacting aeronautical fasteners, we investigate the in situ behaviour of fasteners subject to a current level of a few kA by using high-speed Xray phase-contrast imaging in a synchrotron facility. It reveals that the fastener erosion occurs in two time scales. On a microsecond timescale, hot particles are ejected from cavity walls of the Carbon fibre reinforced polymer due to sparking/arcing phenomena, whereas on a sub-millisecond time scale, the fastener wall is vaporized due to the electrical energy deposited in the arc-fastener interface. The experimental observations have been used as input for an electro-thermal model of electric contact. The estimated vaporised depth is in good agreement with the measured one. The nature of the internal damages has been confirmed by using X-ray phase tomography.
Fichier principal
Vignette du fichier
In Situ X-Ray Phase-Contrast Imaging of Spark Erosion of Aeronautical Fasteners.pdf (2.27 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03878296 , version 1 (29-11-2022)

Identifiers

  • HAL Id : hal-03878296 , version 1

Cite

Amélie Jarnac, Rafael Sousa Martins, Clément Zaepffel, Fabien Tholin, Patrice Blanchet, et al.. In situ x-ray phase-contrast imaging of spark erosion of aeronautical fasteners. ICOLSE 2022 - International Conference On Lightning and Static Electricity, Sep 2022, Madrid, Spain. ⟨hal-03878296⟩
0 View
0 Download

Share

Gmail Facebook Twitter LinkedIn More