Understanding how arc attachment behaviour influences the prediction of composite specimen thermal loading during an artificial lightning strike test

P. Foster, G. Abdelal, A. Murphy

Research output: Contribution to journalArticle

10 Citations (Scopus)
153 Downloads (Pure)

Abstract

High speed image analysis of experimental lightning strike testing on composite specimens has demonstrated complex time-dependent arc attachment behaviour. To date simulation studies of lightning strike direct effects on composite materials have overlooked or idealised the observed arc attachment behaviour. This is significant as these preceding studies have also demonstrated joule (resistive) heating is a major contributor to composite material damage and thus the application of the current load is critically important. The objective of this paper is to quantify how arc attachment behaviour influences the prediction of composite specimen thermal loading during a simulated lightning strike test. This is achieved through a simulation study modelling experimental arc attachment behaviours referenced in the literature. The simulation results are compared with measured test specimen damage. The results quantify for the first time the significance of arc attachment behaviour, demonstrating how realistic representation of arc expansion and arc movement can alter the predicted thermal loading and generate thermal damage patterns comparable to measured experimental damage.
Original languageEnglish
JournalComposite Structures
Early online date14 Mar 2018
DOIs
Publication statusEarly online date - 14 Mar 2018

Keywords

  • Lightning Strike
  • lightning arc attachment
  • thermal-electric loading
  • composite damage
  • Finite Element Modelling

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