通过 MWCNT@GF 传感器的电阻变化监测 GFRP 层间损坏情况

IF 6.5 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2024-10-26 DOI:10.1016/j.coco.2024.102137

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引用次数: 0

摘要

本文旨在研究多壁碳纳米管涂层 GF（MWCNT@GF）传感器在层间剪切损伤监测方面的性能，以及基于短束剪切（SBS）载荷下电阻变化的玻璃纤维增强聚合物（GFRP）传感能力。通过物理气相沉积（PVD）技术制造的 MWCNT@GF 传感器被嵌入到层压板的中性层中，形成一个原位传感网络。在 Keithley 2700 可编程电表和三维数字图像相关（3D-DIC）的帮助下，进行了单调和循环测试。单调试验发现，由于轴外传感器的剪切强度较低，因此它比轴内传感器对剪切破坏更敏感。此外，前 20 个循环载荷下的相对阻力与单调载荷下的阻力相似，这表明传感器具有更强的传感能力。最后，建立了剪切损伤与相对电阻之间的定量关系。这意味着 MWCNT@GF 传感器可用于合理评估损伤状态，并进一步评估结构的使用性能、可靠性和剩余寿命。

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Damage monitoring on inter-lamination of GFRP via the resistance change of the MWCNT@GF sensor

The paper aimed to investigate the performance of multi-walled carbon nanotube-coated GF (MWCNT@GF) sensors on interlayer shear damage monitoring and sensing capability of glass fiber-reinforced polymers (GFRPs) based on the resistance change under short beam shear (SBS) load. The MWCNT@GF sensor, manufactured by physical vapor deposition (PVD), was embedded into the neutral layer of laminates to form an in-situ sensing network. With the help of Keithley 2700 programmable electrometer and the 3D-digital image correlation(3D-DIC), monotonic and cyclic tests were carried out. The monotonic test found that the off-axis sensor is more sensitive to shear failure than the on-axis sensor because of its lower shear strength. Furthermore, the relative resistance under the first 20 cyclic loads was similar to that under monotonic loads, which shows that the sensor has superior sensing ability. Finally, the quantitative relation between shear damage and relative resistance was established. That means MWCNT@GF sensors can be used to reasonably evaluate the damage state and further evaluate the service performance, reliability and remaining life of the structure.

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来源期刊

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.