This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Effect of Lightning Currents on Structural Performance of Composite Material
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 11, 2001 by SAE International in United States
Annotation ability available
High levels of lightning current through carbon fiber composite material can result in local pyrolization of the resin due to heating of the carbon fibers. The loss of resin in the matrix can liberate the fibers resulting in a reduction or “knockdown” of structural performance. The gas produced during pyrolization can also cause delamination of the structural plies, further reducing the structural performance. Two areas of concern are the direct attachment point and fastener locations.
To measure the effect of lightning current on structural performance, two coupon level configurations were employed. One test configuration was a standard, filled hole tension test specimen which had lightning current driven into the protruding head fastener in the center of the part while grounding two edges of the composite material. Different specimens were exposed to four levels of lightning current and then structurally tested for tensile strength. The results were compared to standard filled hole control samples, to determine the relative effect of the various levels of lightning current. The second test configuration evaluated the structural performance of a notched specimen compared to a lightning damaged specimen. An air discharge attachment was made to the center of the test specimen while grounding two edges of the composite material. The width of the damage caused by the lightning current was comparable to the width of a standard notch used to simulate a crack. The standard notch specimen and the comparable lightning damage specimen were structurally tested and compared to determine the relative effect of lightning damage on carbon fiber composite material.
- Diane L. Heidlebaugh - The Boeing Company, Phantom Works, PO Box 3707, MC 8H-11, Seattle, WA 98124-2207
- William B. Avery - The Boeing Company, Phantom Works, PO Box 3707, MC 8H-11, Seattle, WA 98124-2207
- Steve T. Uhrich - The Boeing Company, Phantom Works, PO Box 3707, MC 8H-11, Seattle, WA 98124-2207
CitationHeidlebaugh, D., Avery, W., and Uhrich, S., "Effect of Lightning Currents on Structural Performance of Composite Material," SAE Technical Paper 2001-01-2885, 2001, https://doi.org/10.4271/2001-01-2885.
- Howell, W. E. Effects of Simulated Lightning Currents on the Tensile Strength of Graphite/Epoxy, International Aerospace and Ground Conference on Lighting and Static Electricity Fort Worth TX 1983
- Rouchon J. Gall D. “Evaluation du Gomportement a la Foudre de Strutures en Materiaux Composites Haut Module.” AGARD Conference Proceedings No. 228 April 1980
- Walker, T.H. Avery, W.B. Ilcewicz, L.B. Poe, C.C. Jr. Harris, C.E. “Tension Fracture of Laminates for Transport Fuselage – Part 1: Material Screening,” Second NASA Advanced Technology Conference 197 238 1991
- Walker, T.H., et al “Tension Fracture of Laminates for Transport Fuselage – Part 2: Large Notches.” Third NASA Advanced Technology Conference 727 758 1992
- Ilcewicz, L.B., et al “Tension Fracture of Laminates for Transport Fuselage – Part 4: Damage Tolerance Analysis,” Second NASA Advanced Technology conference 197 238 1991
- Awerbuch, J. Madhukar, M.S. “Notched strength of Composite Laminates: Predictions and Experiments – A Review” J Reinforced Plastrics and composites 4 January 1985 1 159
- Hawley, A.V. “Preliminary Design of a Transport Aircraft Composite Wing,” Fifth NASA/DoD Advanced Technology Conference 717 772 1995
- Markus, A.M Grossheim, B.G. “Manufacturing Development for Stitched/RFI Transport Wing Box Structures,” Fifth NASA/DoD Advanced Technology Conference 773 786 1995
- Talreja R. Fatigue of Composite Materials Technomic Publishing Lancaster, PA 1987