圆柱形碳纤维增强聚合物(CFRP)筋的溶液吸收

IF 2 4区 工程技术 Q3 ENGINEERING, CHEMICAL
P. Scott, Eleni Toumpanaki, J. Lees
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引用次数: 0

摘要

研究了海洋环境中碳纤维增强聚合物(CFRP)预应力混凝土结构的盐水暴露条件。扩散到直径相对较小的CFRP筋中可能是一个漫长的过程,因此使用环氧薄膜上的短期实验来预测长期吸湿性将是有利的。然而,复合材料中的纤维夹杂物会带来复杂性,并且通常需要与纯环氧树脂试样相关的因素。将基于20°C和60°C下暴露于盐水溶液的CFRP筋的吸湿结果的扩散参数与使用等效薄膜试样获得的扩散参数进行了比较。选择较高的温度以加速水分吸收。研究发现,测得的钢筋束和环氧树脂扩散率的比值与温度有关,较高的温度和盐溶液的组合导致钢筋束中吸湿的倾向增加。从环氧薄膜的扩散率预测CFRP筋扩散率的现有分析模型似乎没有捕捉到观察到的趋势。然而,使用具有纤维界面区的晶胞进行的预测表明,这可能是由于界面区的扩散率增加所致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Solution Uptake in Cylindrical Carbon-Fibre-Reinforced Polymer (CFRP) Tendons
Salt water exposure conditions relevant to carbon-fibre-reinforced polymer (CFRP) prestressed concrete structures in marine environments are investigated. The diffusion into relatively small diameter CFRP tendons can be a lengthy process so the prediction of the long-term moisture uptake using short-term experiments on thin films of epoxy would be advantageous. However, the fibre inclusions within a composite introduce complexities, and factors are typically required for correlation with pure epoxy specimens. Diffusion parameters based on moisture uptake result from CFRP tendons exposed to salt water solution at 20°C and 60°C are compared with those obtained using equivalent thin film specimens. The higher temperature is selected to accelerate the moisture uptake. It is found that the measured ratios of tendon and epoxy diffusivity were temperature dependent, and the combination of the higher temperature and salt solution leads to an increased propensity for moisture uptake in the tendon. Existing analytical models to predict the CFRP tendon diffusivity from that of a thin film of epoxy did not appear to capture the observed trends. However, predictions using a unit cell with a fibre interface zone suggest that this may be due to an increased diffusivity in the interphase region.
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来源期刊
Advances in Polymer Technology
Advances in Polymer Technology 工程技术-高分子科学
CiteScore
5.50
自引率
0.00%
发文量
70
审稿时长
9 months
期刊介绍: Advances in Polymer Technology publishes articles reporting important developments in polymeric materials, their manufacture and processing, and polymer product design, as well as those considering the economic and environmental impacts of polymer technology. The journal primarily caters to researchers, technologists, engineers, consultants, and production personnel.
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