Effect of corrosion environments on the secondary impact damage and residual compressive strength of carbon fiber composites

doi:10.19936/j.cnki.2096-8000.20250728.004

Abstract

Abstract: The properties of carbon fiber composites depend largely on the environment in which they are used. The effects of three aging environments (distilled water, 10% sulfuric acid solution and sodium hydroxide solution) at the same temperature (70 ℃) on the secondary impact damage and residual compressive strength of T700 carbon fiber/epoxy resin matrix composites were studied. Fourier transform infrared spectroscopy (FTIR), the surface morphology before and after aging and the C-scan damage morphology were studied and analyzed. The results show that only physical damage occurs in the samples in distilled water and acid solution, and the changes of surface topography, C-scan damage morphology and residual compressive strength are related to the infiltration of water molecules. In alkali solution, the sample is seriously damaged, and the resin also has a chemical reaction. The properties of the material and the C-scan damage morphology have both effects on hygroscopicity and chemical damage of the resin. The research results are of great practical significance for improving the continuous service life and maintenance economy of these composite materials in complex environment.

Key words: T700 carbon fiber/epoxy resin matrix composites, secondary impact damage, compression performance, surface topography, C-scan damage morphology

CLC Number:

TB332

CHEN Yanrong, WANG Xingyin, XU Liang, SUN Lin, WANG Xin. Effect of corrosion environments on the secondary impact damage and residual compressive strength of carbon fiber composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(7): 27-32.

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