基于电阻测量和数字图像相关的碳纳米管改性玻璃纤维增强聚合物复合材料结构健康监测

IF 5.7 2区 工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY Structural Health Monitoring-An International Journal Pub Date : 2023-05-17 DOI:10.1177/14759217231173439
G. Uribe-Riestra, P. Ayuso-Faber, Miguel A. Rivero-Ayala, J. Cauich-Cupul, F. Gamboa, F. Avilés
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引用次数: 0

摘要

采用基于电阻变化的方法对多尺度复合材料在单调和循环弯曲载荷作用下的不可见损伤进行了评价。该复合材料包括在乙烯基酯基质中由碳纳米管改性的玻璃纤维编织。损伤传感是通过在四点弯曲试样表面附近放置一组电极来实现的,并与数字图像相关(DIC)测量的应变场相关联。顶部(压缩)表面的电阻变化小于底部(拉伸)表面。电阻的空间测量可以识别出受损最严重的区域,这与DIC确定的区域相吻合。DIC还表明,不可逆的层间剪切应变在靠近支撑和/或加载引入元件的地方积聚,这与分层的位置相吻合。电技术不仅可以检测到纤维断裂和基体开裂的初始损伤形式,还可以检测到循环载荷和低速冲击下的损伤进展。
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Structural health monitoring of carbon nanotube-modified glass fiber-reinforced polymer composites by electrical resistance measurements and digital image correlation
A method based on changes of electrical resistance was used to evaluate non-visible damage inflicted to multiscale hierarchical composites subjected to monotonic and cyclic bending loads. The composites comprise glass fiber weaves modified by carbon nanotubes in a vinyl ester matrix. Damage sensing is achieved by placing an array of electrodes close to the surfaces of four-point bending specimens and is correlated to strain fields measured by digital image correlation (DIC). The top (compressive) surface exhibited lower electrical resistance changes than the bottom (tensile) one. Spatial measurements of electrical resistance allowed identification of the most severely damaged zones, which coincided with those pinpointed by DIC. DIC also indicated an important presence of irreversible interlaminar shear strains accumulating close to the supports and/or loading introduction elements, which coincided with the location of delamination. The electrical technique allowed not only the detection of the onset of damage in the form of initial fiber breakage and matrix cracking, but also the detection of damage progression under cyclic loading and low-velocity impact.
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来源期刊
CiteScore
12.80
自引率
12.10%
发文量
181
审稿时长
4.8 months
期刊介绍: Structural Health Monitoring is an international peer reviewed journal that publishes the highest quality original research that contain theoretical, analytical, and experimental investigations that advance the body of knowledge and its application in the discipline of structural health monitoring.
期刊最新文献
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