玻纤增强甲基丙烯酸酯基UV-CIPP材料抗弯性能及失效分析  

Analysis of Flexural Performance and Failure of Glass Fiber Reinforced Methacrylate-based Ultraviolet Cured-in-Place Pipe Materials

作　　者：夏洋洋 方宏远[1,2,3] 张超 王翠霞[1,2,3] 石明生 XIA Yangyang;FANG Hongyuan;ZHANG Chao;WANG Cuixia;SHI Mingsheng(School of Water Conservancy and Transportation/Yellow River Laboratory,Zhengzhou University,Zhengzhou 450001,China;National Local Joint Engineering Laboratory of Major Infrastructure Testing and Rehabilitation Technology,Zhengzhou 450001,China;Collaborative Innovation Center for Disaster Prevention and Control of Underground Engineering Jointly Built by Provinces and Ministries,Zhengzhou 450001,China)

机构地区：[1]郑州大学水利与交通学院/黄河实验室,郑州450001 [2]重大基础设施检测修复技术国家地方联合工程实验室,郑州450001 [3]地下工程灾变防控省部共建协同创新中心,郑州450001

出　　处：《材料导报》2024年第12期290-296,共7页Materials Reports

基　　金：国家自然科学基金(52178368,51909242,52009125);河南省高效科技创新团队和人才培养计划(23IRTSTHN004,23HASTIT007);中国博士后基金(2021T140619,2021M692939);河南省自然科学基金重点项目(232300421137);河南省博士后科研项目启动资助(202001016);黄河实验室(郑州大学)一流课题(YRL22LT07)~~

摘　　要：管道修复用紫外光原位固化(Ultraviolet cured-in-place pipe,UV-CIPP)材料是一种玻纤复合材料,其抗弯性能是评价管道修复效果以及材料优化设计所需的重要参考指标。以玻纤增强甲基丙烯酸酯基UV-CIPP材料为研究对象,考虑固化时间、固化距离、紫外灯功率和材料厚度的影响,基于融合高清视频和SEM观测的三点弯曲试验,对玻纤增强甲基丙烯酸酯基UV-CIPP材料抗弯性能和失效机制进行了研究。结果表明,UV-CIPP材料的失效过程可以分为三个阶段:弹性阶段、基体开裂阶段和玻纤布断裂阶段,基体开裂、脱粘分层和纤维拉拔断裂是玻纤增强甲基丙烯酸酯基UV-CIPP材料弯曲失效的主要原因。在单一变量影响下,玻纤增强甲基丙烯酸酯基UV-CIPP材料弯曲强度和弯曲模量随固化时间、固化距离和紫外灯功率的增大均呈现出先增大后减小的趋势,随着材料厚度的增大却逐渐减小。本研究不仅为UV-CIPP材料的优化设计提供了参考依据,也为国产化UV-CIPP材料的发展奠定了重要基础。Ultraviolet curable in-place pipe(UV-CIPP)is a glass fiber composite material.Its flexural performance is an important reference index necessary to evaluate the effectiveness of pipeline rehabilitation and material optimization design.The flexural performance and failure mechanism of glass fiber-reinforced methacrylate-based UV-CIPP materials were investigated based on a three-point bending test that incorporated HD video and SEM observations,and accounted for the effects of curing time,curing distance,UV lamp power,and material thickness.Failure of glass fiber-reinforced methacrylate-based UV-CIPP materials was divided into three stages:elastic deformation,matrix cracking,and glass fiber fracture.Matrix cracking,debonding delamination,and fiber pull-out fracture caused bending failures in this material.Under the influence of a single variable,the flexural strength and flexural modulus of UV-CIPP materials firstly increased and then decreased with additional curing time,curing distance,and UV lamp power,but gradually decreased with increased material thickness.This study provides a reference basis for optimal UV-CIPP material design while laying an important foundation to develop of domestic UV-CIPP materials.

关 键 词：紫外光原位固化(UV-CIPP)材料 三点弯曲试验 高清视频 SEM 固化参数 材料厚度 

分 类 号：TU599[建筑科学—建筑技术科学]