湿热环境下纤维增强复合材料吸湿与界面性能研究

doi:10.19936/j.cnki.2096-8000.20241028.012

复合材料科学与工程 ›› 2024, Vol. 0 ›› Issue (10): 87-96.DOI: 10.19936/j.cnki.2096-8000.20241028.012

湿热环境下纤维增强复合材料吸湿与界面性能研究

张藕生¹, 李承高², 牛延沼², 田经纬², 咸贵军², 郭瑞^2*

1.中石化(上海)石油化工研究院有限公司, 上海 201208;
2.哈尔滨工业大学土木工程学院, 哈尔滨 150090

收稿日期:2024-03-20 出版日期:2024-10-28 发布日期:2024-12-10
通讯作者: 郭瑞(1994—),男,博士,助理研究员,研究方向为纤维增强复合材料与结构,guorui080539@163.com。
作者简介:张藕生(1997—),男,硕士,高级工程师,研究方向为树脂基先进复合材料。
基金资助:
国家重点研发计划资助(2021YFB3704402)

Study on water absorption and interfacial properties of CFRP and GFRP composites in hygrothermal environment

ZHANG Ousheng¹, LI Chenggao², NIU Yanzhao², TIAN Jingwei², XIAN Guijun², GUO Rui^2*

1. Sinopec Shanghai Research Institute of Petrochemical Technology Co.,Ltd., Shanghai 201208, China;
2. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China

Received:2024-03-20 Online:2024-10-28 Published:2024-12-10

摘要/Abstract

摘要： 湿热环境下纤维增强树脂基复合材料(FRP)力学性能会发生劣化,影响其服役性能与寿命。本论文研究了拉挤碳纤维(CFRP)与玻璃纤维增强复合材料(GFRP)杆体在40 ℃、60 ℃与80 ℃蒸馏水中的吸湿与扩散行为,以及杆体的短梁剪切强度退化规律,建立了基于时温等效原理的杆体短梁剪切强度寿命预测模型。结果表明:GFRP杆体具有较低的水扩散速率与饱和吸水率;水分子与浸泡温度是影响杆体短梁剪切强度劣化的关键因素,在低温浸泡下,杆体短梁剪切强度随着水分子的侵入快速退化;80 ℃高温暴露加速玻璃纤维-树脂界面脱黏,导致GFRP杆体的短梁剪切强度退化速率远远高于CFRP杆体速率。长期寿命预测结果表明,CFRP杆体短梁剪切强度稳定保留率为77.4%,而GFRP杆体短梁剪切强度在长期浸泡下完全丧失。

关键词: 纤维增强树脂复合材料杆体, 湿热耐久性, 短梁剪切, 时温等效, 寿命预测

Abstract: The mechanical properties of fiber reinforced resin composites (FRP) deteriorate under hygrothermal environment, which will affect its service performance and life. In this paper, the water absorption and diffusion behavior of pultruded carbon fiber and glass fiber reinforced composite (CFRP and GFRP) rods in distilled water at 40 ℃, 60 ℃ and 80 ℃, as well as the short beam shear strength degradation rule of rods were studied, the life prediction model of short beam shear strength was established based on time-temperature equivalent principle. The results show that the GFRP rod has lower water diffussion rate and saturation water absorption rate. Water molecules and immersion temperature are the key factors affecting the deterioration of short beam shear strength. Under low immersion temperature, the short beam shear strength rapidly degrades with the ingression of water molecules. High temperature exposure at 80 ℃ accelerated the debonding of glass fiber-resin interface, resulting in the degradation rate of short beam shear strength of GFRP rod is much higher than that of CFRP rod. The long-term life prediction results show that the stable short beam shear strength retention rate of CFRP rod is 77.4%, while the short beam shear strength of GFRP rod is completely lost under long-term immersion.

Key words: FRP rods, hygrothermal durability, short beam shear strength, time-temperature equivalent, life prediction

中图分类号:

TB332

张藕生, 李承高, 牛延沼, 田经纬, 咸贵军, 郭瑞. 湿热环境下纤维增强复合材料吸湿与界面性能研究[J]. 复合材料科学与工程, 2024, 0(10): 87-96.

ZHANG Ousheng, LI Chenggao, NIU Yanzhao, TIAN Jingwei, XIAN Guijun, GUO Rui. Study on water absorption and interfacial properties of CFRP and GFRP composites in hygrothermal environment[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(10): 87-96.

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湿热环境下纤维增强复合材料吸湿与界面性能研究

Study on water absorption and interfacial properties of CFRP and GFRP composites in hygrothermal environment

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