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材料导报  2022, Vol. 36 Issue (13): 21040232-8    https://doi.org/10.11896/cldb.21040232
  金属与金属基复合材料 |
基于金属磁记忆的持荷钢绞线腐蚀检测试验研究
张洪1,2, 蒋合靖1,2, 夏润川1,2, 王瑰玫1,2, 黎娅1,2, 周建庭1,2,*
1 省部共建山区桥梁及隧道工程国家重点实验室,重庆 400074
2 重庆交通大学土木工程学院,重庆 400074
Research on Corrosion Detection Test of Load-bearing Steel Strand Based on Metal Magnetic Memory
ZHANG Hong1,2, JIANG Hejing1,2, XIA Runchuan1,2, WANG Guimei1,2, LI Ya1,2, ZHOU Jianting1,2,*
1 State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing 400074, China
2 School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China
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摘要 目前,基于金属磁记忆自漏磁效应的微观损伤检测方法应用广泛,但在钢绞线腐蚀损伤的检测试验中,荷载对试验结果的影响尚不明晰,而由于力-磁效应使得荷载的影响不容忽略。针对该问题,对电化学腐蚀后的钢绞线进行了张拉,考虑荷载效应影响,开展了持荷钢绞线的磁记忆检测试验。结果表明:腐蚀钢绞线在承受轴向荷载作用后,其漏磁曲线切向分量Bx在腐蚀区域中心处出现极大值,两侧呈不对称分布;漏磁曲线法向分量Bz在腐蚀区域中部“过零点”,两侧出现两个极值点;随着腐蚀程度的增加,漏磁信号特征值ΔBxmax及|ΔBxmin|呈现非线性增长趋势;随着荷载的增加,ΔBxmax及|ΔBxmin|呈先增大后减小的趋势。归一化后的“峰谷值”MB随着腐蚀率C的增加而增大,三阶多项式曲线较好地拟合了MB与C之间的强相关性,同时也说明了应力对该特征值的影响较小,该特征值的提出提高了检测的精度。
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张洪
蒋合靖
夏润川
王瑰玫
黎娅
周建庭
关键词:  金属磁记忆  漏磁  腐蚀检测  钢绞线  荷载    
Abstract: At present, the method of micro-damage detection, based on the metal magnetic memory self-leakage effect,is widely used. However, in the process of detecting the corrosion of steel strand, the influence of load on test results is unclear, which cannot be ignored due to the stress-magnetization coupling effect. To solve this problem, the steel strand after electrochemical corrosion was tensioned. And after considering the effect of load, the magnetic memory test of steel strand was carried out. The experimental results show that, at the center of the corrosion area, the tangential magnetic flux leakage component (Bx) of the specimens reaches the maximum, and the normal magnetic flux leakage component (Bz) is zero. On either side of the corrosion area, the Bx distributes asymmetrically, and the Bz reaches its extreme points. With the corrosion degree increasing, the characteristic indicators of the magnetic flux leakage signal (ΔBxmax and |ΔBxmin|) increased nonlinearly. With the corrosion load increasing, ΔBxmax and |ΔBxmin| increases first and then decreased. The normalized ‘peak and valley’ MB increases with the increase of the corrosion rate C. The correlation between MB and C is verified by third-order polynomial fit. MB wasn't sensitive to stress, and thus the detection accuracy can be improved by using the proposed characteristic indicator.
Key words:  metal magnetic memory    magnetic flux leakage    corrosion detection    steel strand    load
出版日期:  2022-07-10      发布日期:  2022-07-12
ZTFLH:  U446  
基金资助: 国家自然科学基金(51808081;U20A20314);重庆市杰出青年科学基金(cstc2020jcyj-jqX0006);重庆市自然科学基金(cstc2022ycjh-bgzxm0086)
通讯作者:  * jtzhou@cqjtu.edu.cn   
作者简介:  张洪,重庆交通大学土木工程学院教授、博士研究生导师。2009年重庆交通大学通信工程专业本科毕业,2012年重庆交通大学计算机应用技术专业硕士毕业,2017年重庆交通大学桥梁与隧道工程专业博士毕业后留校工作至今。目前主要从事桥梁健康监测及无损检测研究。发表论文50余篇,包括Corrosion Science、Engineering Structures、Journal of Magnetism and Magnetic Materials、Measurement、Nondestructive Testing and Evaluation、《土木工程学报》《仪器仪表学报》等。
周建庭,重庆交通大学教授、博士研究生导师。1993年重庆交通大学公路工程专业本科毕业,1996年重庆交通大学桥梁工程专业硕士毕业后留校至今,2005年重庆大学仪器科学与技术专业博士毕业。目前主要从事桥梁检测、监测、评估与加固研究。发表论文300余篇,包括Engineering Structures、Construction and Building Materials、Cement and Concrete Composites、Journal of Sound and Vibration、Structural Health Monitoring、Measurement、Nondestructive Testing and Evaluation、《土木工程学报》《中国公路学报》《振动与冲击》《材料导报》等。
引用本文:    
张洪, 蒋合靖, 夏润川, 王瑰玫, 黎娅, 周建庭. 基于金属磁记忆的持荷钢绞线腐蚀检测试验研究[J]. 材料导报, 2022, 36(13): 21040232-8.
ZHANG Hong, JIANG Hejing, XIA Runchuan, WANG Guimei, LI Ya, ZHOU Jianting. Research on Corrosion Detection Test of Load-bearing Steel Strand Based on Metal Magnetic Memory. Materials Reports, 2022, 36(13): 21040232-8.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.21040232  或          http://www.mater-rep.com/CN/Y2022/V36/I13/21040232
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