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首页> 外文期刊>International journal of applied electromagnetics and mechanics >Detection of delamination in laminated CFRP composites using eddy current testing: Simulation and experimental study
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Detection of delamination in laminated CFRP composites using eddy current testing: Simulation and experimental study

机译：使用涡流检测检测层压CFRP复合材料中的分层：模拟和实验研究

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摘要

The applicability of conventional eddy current (EC) testing to detect delamination in laminates of carbon fiber reinforced polymers (CFRP) was assessed. As delamination impedes the induced currents flowing across the layers, the EC technique offers the potential for delamination in CFRPs to be detected by sensing the change in probe output signals caused by distortions in the magnetic field. In a numerical study, ECs distribution in CFRPs alters considerably in multidirectional and cross-ply laminates and currents drop steeply when delamination is present. In experiments, the detectability of delamination at different depths was investigated using 24-layer laminates, each with different stacking sequences. The change in amplitude of the probe output signal obtained from data agrees qualitatively with the numerical analysis. The size and location of the delamination defect were compared with those obtained in ultrasonic scanning images. Experiments show that delamination at a maximum depth of 0.75 mm in cross-ply samples could be detected, whereas subsurface defects in the unidirectional plate went undetected.
机译：评估常规涡流（EC）测试的适用性检测碳纤维增强聚合物（CFRP）层压板中的分层。作为分层阻碍流过层的感应电流，EC技术通过感测由磁场中的畸变引起的探针输出信号的变化来检测CFRP中的分层电位。在一个数值研究中，CFRPS中的ECS分布在多向和交叉层层压板中大大改变，当存在分层时急剧下降。在实验中，使用具有不同堆叠序列的24层层压板研究了不同深度分层的可检测性。从数据获得的探针输出信号的幅度的变化与数值分析同意。将分层缺陷的大小和位置与超声波扫描图像中获得的那些进行比较。实验表明，可以检测到在交叉层样品中最大深度的最大深度的分层，而单向板中的地下缺陷未被检测到。

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