Analysis of lightning ablation damage of SMA-CFRP composite laminates based on electro-thermal coupling model
In order to study the lightning damage protection effect of shape memory alloy(SMA)materials on carbon fiber reinforced polymer(CFRP)composite laminates,a finite element analysis model for lightning damage of laminates containing shape memory alloy(SMA-CFRP)wires was established based on a commonly used lightning electric thermal coupling model.The model was compared with reference results to verify its validity,and the lightning protection effect of SMA wires was analyzed by comparing it with the lightning damage of traditional laminates.In addition,the influence of factors such as different peak currents,different numbers of SMA wires,different spacing between embedded SMA wire regions,and different laminate stacking sequences on the ablation damage results of SMA-CFRP laminates was analyzed,and the influencing law was analyzed.The results show that the SMA has a significant effect on lightning damage protection of CFRP laminates.Under a peak lightning current of 25 kA,the area of ablation damage reduces to 57.43％of the unprotected laminates.In addition,the number of SMA wires,the spacing between embedded SMA wire regions and the laminate stacking sequence have a significant impact on the area and depth of ablation damage in the SMA-CFRP laminates.
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