Damage Detection of Cross-Plied CFRP Laminates Based on Rectangular Differential Pulse Eddy Current Sensors

IF 1 4区材料科学 Q3 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Research in Nondestructive Evaluation Pub Date : 2021-09-03 DOI:10.1080/09349847.2021.1985669

W. Fan, Haotian Zhang

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引用次数: 1

Abstract

ABSTRACT Carbon fiber reinforced polymer (CFRP) laminates are extensively used in aviation due to their excellent material properties. Damages resulted from manufacturing or usage seriously undermine the safety of aircraft structures. Therefore, the efficient detection of the damage in CFRP laminates is important. In this paper, three kinds of common damages including impact damage, crack damage and delamination damage are detected based on pulsed eddy current (PEC) with rectangular differential sensors. Firstly, to overcome shortcomings of traditional PEC sensors, an optimized rectangular differential sensor is proposed in the study. Then, a normalization method is introduced to process the differential signal obtained with the sensor. Finally, the relationship between the size of the damage and the normalized differential signal is investigated. The investigation results show that the rectangular differential sensor can detect the three types of damages. When a new damage object is detected, the measurement step of a reference signal is omitted. The peak value of the normalized differential signal increases with the increase in damage size. The new PEC method has been proved in the study.

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基于矩形差分脉冲涡流传感器的CFRP交叠板损伤检测

碳纤维增强聚合物(CFRP)层压板以其优异的材料性能在航空领域得到了广泛的应用。在制造或使用过程中造成的损坏严重影响了飞机结构的安全。因此，对碳纤维复合材料层合板进行有效的损伤检测具有重要意义。本文采用矩形差分脉冲涡流传感器对冲击损伤、裂纹损伤和分层损伤三种常见损伤进行了检测。首先，针对传统脉冲电流传感器的不足，提出了一种优化的矩形差动传感器。然后，引入一种归一化方法对传感器得到的差分信号进行处理。最后，研究了损伤大小与归一化差分信号之间的关系。研究结果表明，矩形差动传感器可以检测到三种类型的损伤。当检测到新的损伤物体时，省略了参考信号的测量步骤。归一化差分信号的峰值随损伤尺寸的增大而增大。该方法在实验中得到了验证。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Research in Nondestructive Evaluation 工程技术-材料科学：表征与测试

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Research in Nondestructive Evaluation® is the archival research journal of the American Society for Nondestructive Testing, Inc. RNDE® contains the results of original research in all areas of nondestructive evaluation (NDE). The journal covers experimental and theoretical investigations dealing with the scientific and engineering bases of NDE, its measurement and methodology, and a wide range of applications to materials and structures that relate to the entire life cycle, from manufacture to use and retirement. Illustrative topics include advances in the underlying science of acoustic, thermal, electrical, magnetic, optical and ionizing radiation techniques and their applications to NDE problems. These problems include the nondestructive characterization of a wide variety of material properties and their degradation in service, nonintrusive sensors for monitoring manufacturing and materials processes, new techniques and combinations of techniques for detecting and characterizing hidden discontinuities and distributed damage in materials, standardization concepts and quantitative approaches for advanced NDE techniques, and long-term continuous monitoring of structures and assemblies. Of particular interest is research which elucidates how to evaluate the effects of imperfect material condition, as quantified by nondestructive measurement, on the functional performance.