A virtual test framework for residual compressive and tensile strength predictions after lightning strikes

S.L.J. Millen, Xiaodong Xu, Juhyeong Lee, Adrian Murphy

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This paper presents the background and application of an integrated modelling framework for the prediction of Compression After Lightning Strike (CAL) before it is further demonstrated on Tension after Lightning Strikes (TAL) analyses. A three-stage modelling analysis workflow is developed including sequentially coupled thermal-electric and thermo-mechanical models, to predict both transient thermal and dynamic mechanical damage from a strike, before residual strength is quantified. Validations are completed at each simulation stage in the CAL framework. Lightning-induced thermal damage, resulting from Joule heating, is validated using experimental observations while predicted delamination is validated by X-ray Computed Tomography (CT) images. Results show that, for a 75 kA Waveform D lightning strike, the predicted thermal damage area is within 7% of the experiment, the predicted thermo-mechanical damage area is within 8% of the experiment, and the predicted CAL strength is within 1.2% of the experimental value. The predicted CAL strength for the specimen was 275 MPa, a reduction of 59% from the baseline strength of 666 MPa, while the TAL strength, for the same test case, was 513 MPa, a reduction of 44% from the baseline strength of 911 MPa in the literature.
Original languageEnglish
Title of host publicationProceedings of the 21st European Conference on Composite Materials, ECCM21
EditorsChristophe Binetruy, Frédéric Jacquemin
PublisherEuropean Society for Composite Materials
ISBN (Electronic) 9782912985019
Publication statusPublished - 2024
Event 21st European Conference on Composite Materials 2024 - Nantes, France
Duration: 02 Jul 202405 Jul 2024
https://gem.ec-nantes.fr/en/eccm21-proceedings/ (Conference proceedings)


Conference 21st European Conference on Composite Materials 2024
Abbreviated titleECCM21
Internet address

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