湿热老化环境下碳纤维增强树脂基复合材料力学性能退化机制及性能预测

doi:10.11896/cldb.23110140

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Abstract To investigate the mechanical performance degradation mechanisms of carbon fiber reinforced polymers (CFRP) in hydrothermal environments, samples were immersed in water baths filled with distilled water at temperatures of 30 ℃ and 50 ℃, respectively. Tensile and compressive tests were performed using CFRP samples aged for 0 (unaged), 6, 12, 18, 24, and 30 days. Effects of hygrothermal aging on surface morphology and failure modes were analyzed via SEM (Scanning Electron Microscopy). A two-dimensional constitutive model, which was capable of simulating the influences of hygrothermal aging on the intralaminar cracking and interlaminar delamination, was developed utilizing the user subroutine VUMAT of the ABAQUS software. Mechanical performance calculations for CFRP composites were conducted under both pre-aging and saturated water absorption conditions. Experimental results showed that the moisture absorption behavior of CFRP composites followed Fick's law at both 30 ℃ and 50 ℃. Mechanical properties of CFRP composites showed a decrease with the temperature/aging time increasing. Moreover, compared to the tensile performance, the compressive properties of CFRP composites were more sensitive to the variation of environments. After 30 days of aging in a 50 ℃ environment, the tensile strength and modulus decreased by 8.11% and 7.08%, respectively, which was worse than the 39.3% and 10.8% reductions for the compressive strength and modulus, respectively. Deterioration of the fiber-matrix interface and the epoxy matrix caused by moisture diffusion was identified as the reason for compressive performance degradation.

Key words： carbon fiber reinforced polymers (CFRP) hydrothermal aging mechanical performance numerical simulation

Published: 25 March 2025 Online: 2025-03-24

CLC number:

TB332

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	Articles by authors
	WANG Yining
	CHEN Dongdong
	XIAO Shoune
	WANG Mingmeng
	HE Zikun

Cite this article:

WANG Yining,CHEN Dongdong,XIAO Shoune, et al. Degradation Mechanisms and Performance Prediction of Carbon Fiber Reinforced Polymer Composites Subjected to Hydrothermal Aging[J]. Materials Reports, 2025, 39(6): 23110140-8.

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https://www.mater-rep.com/EN/10.11896/cldb.23110140 OR https://www.mater-rep.com/EN/Y2025/V39/I6/23110140

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