基于CFRP智能表层的GFRP结构变形监测

复合材料科学与工程 ›› 2015, Vol. 0 ›› Issue (11): 20-24.

基于CFRP智能表层的GFRP结构变形监测

郑华升^1,2, 李静³, 朱四荣⁴, 李卓球⁴

1.冶金工业控制系统科学湖北省重点实验室,湖北武汉 430081;
2.武汉科技大学理学院,湖北武汉 430081;
3.武汉理工大学华夏学院,湖北武汉 430223;
4.武汉理工大学理学院,湖北武汉 430070

收稿日期:2015-06-10 出版日期:2015-11-28 发布日期:2021-09-14
作者简介:郑华升(1981-),男,讲师,博士,主要从事碳纤维复合材料方面的研究,whutzhs@sina.com。
基金资助:
省部共建耐火材料与冶金国家重点实验室开放基金资助项目(G201407);冶金工业过程系统科学湖北省重点实验室开放基金(Y201416);武汉科技大学青年科技骨干培育计划项目(2014xz020);湖北省自然科学基金(2013CFA131)

DEFORMATION MONITORING FOR GFRP STRUCTURES BY CFRP SMART LAYER

ZHENG Hua-sheng^1,2, LI Jing³, ZHU Si-rong⁴, LI Zhuo-qiu⁴

1. Hubei Province Key Laboratory of Systems Science in Metallurgical Process, Wuhan 430081,China;
2. School of Science, Wuhan University of Science and Technology, Wuhan 430081, China;
3. Huaxia College, Wuhan University of Technology, Wuhan 430223, China;
4. School of Science, Wuhan University of Technology, Wuhan 430070, China

Received:2015-06-10 Online:2015-11-28 Published:2021-09-14

摘要/Abstract

摘要： 以短切碳纤维毡和环氧树脂为原材料制备CFRP复合材料,提出将其作为智能表层用于GFRP结构变形监测。实验结果表明,CFRP智能表层具有稳定的伏安性能和力阻效应,随着拉应变的增加,其电阻表现出线性的可恢复的增大,且具有较好的稳定性;利用CFRP智能表层电阻变化,无论是将其敷设在受拉侧还是受压侧,均可实时监测GFRP梁的弯曲变形;通过采用不同电极布置方式的对比试验发现,CFRP智能表层的测试结果受到电极布置方式的影响,端部电极四电极法和表面电极四电极法的力阻灵敏度分别为5.9和7.3,而两电极法的灵敏度可达到13.1,但在稳定性方面四电极法优于两电极法。

关键词: GFRP, CFRP, 力阻效应, 变形监测

Abstract: For the purpose of long-term real-time health monitoring for GFRP structures, composite made of short-cut carbon fiber mat and epoxy resin was applied as a smart layer for deformation measuring. The piezoresistivity of the smart layer was studied by cyclical tension test, and it was applied on a three point bending beam. The stable VA characteristic and piezoresistivity were confirmed in CFRP smart layer. Under cyclical tension, the resistance of CFRP smart layer was observed to increase linearly and reversibly with stability. Based on its piezoresisitivity, the resistance of the CFRP smart layer is able to reflect the bending deformation of the GFRP beam whether it is on the tension side or compression side. Furthermore, the results reveal that such a method can be affected by electrode configuration: the resistance responses of four-probe method are more stable, but the gauge factors are comparatively low, which is 5.9 for four-end probe method and 7.3 for four-surface probe method; two-probe method can improve the gauge factor to 13.1, but is inferior to four-probe method in stability.

Key words: GFRP, CFRP, piezoresisitivity, deformation monitoring

中图分类号:

TB332
TB31

郑华升, 李静, 朱四荣, 李卓球. 基于CFRP智能表层的GFRP结构变形监测[J]. 复合材料科学与工程, 2015, 0(11): 20-24.

ZHENG Hua-sheng, LI Jing, ZHU Si-rong, LI Zhuo-qiu. DEFORMATION MONITORING FOR GFRP STRUCTURES BY CFRP SMART LAYER[J]. COMPOSITES SCIENCE AND ENGINEERING, 2015, 0(11): 20-24.

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