04.1 - Aerospace Grade Materials, Structural Analysis, Fatigue and Damage Tolerance
MULTIPHYSICS COUPLING EFFECT ON INTERFACIAL PROPERTIES OF CNT/GFRP/CFRP COMPOSITES FOR ELECTROTHERMAL ANTI-/DE-ICING APPLICATIONS
X. Yao¹, Y. Wang¹, H. Wang¹, Y. Wang¹; ¹Northwestern Polytechnical University, China
With the increasing use of composites in aerostructures owing to the lightweight and design flexibility, multifunctional structures have drawn much attention for integrated design. Carbon nanotubes (CNTs) could be integrated into the carbon fibre reinforced polymer (CFRP) composite aerostructures for electrothermal anti-/de-icing. Among which, electrical insulation layer should be applied to prevent the short circuit, and glass fibre reinforced polymer (GFRP) composites were employed. However, the thermal and moisture mismatch between different plies and materials will lead to property degradation due to the multiphysics coupling effect. CNT/GFRP/CFRP composites with different thermal cycles between -55 ℃ and +80 ℃ were studied in this work, to simulate the anti-/de-icing service conditions. Up to 10,000 thermal cycles, as well as hygrothermal aging and thermo-hygro-mechanical coupling environment, have been applied to the composites, with the interlaminar shear strength (ILSS) evaluated periodically. Fickian model fits the moisture absorption curves well for both hygrothermal and thermo-hygro-mechanical coupling environments. The composites exhibit excellent thermal stability under thermal cycling, with 89% ILSS maintained after 10,000 cycles. However, with additional moisture and mechanical loading applied, the strength degraded largely due to the deteriorated interfacial properties.
DOI: 10.71945/icas2026_0083