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首页> 外文期刊>Composite Structures >Eddy-current array-probe technique for imaging near-surface and deep-lying delaminations in multidirectional carbon fiber composites
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Eddy-current array-probe technique for imaging near-surface and deep-lying delaminations in multidirectional carbon fiber composites

机译：用于在多向碳纤维复合材料中成像近表面和深层分层的辅电流阵列探测技术

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摘要

An eddy-current array-probe method was proposed to visualize delamination occurring within multidirectional carbon fiber-reinforced plastics. First, samples with a near-surface delamination were scanned by a coil array probe comprising a single driver coil and multiple pickup coils, and the detectability of the delamination was evaluated by the signal-to-noise ratio. An appropriate selection of the image phase and the distance between the driver and pickup coils enabled detection of the delamination suppressing the signal variation in the non-defective region. Furthermore, the experimental results suggested that the distance between the driver coil and the most sensitive pickup coil correlated with the delamination size. Second, the array-probe technique was used to detect a delamination located at various depths. The detectability of the delamination was found to be strongly affected by the rotation angle of the array probe. The optimum probe rotation angle depended on the depth of the delamination, indicating that a delamination occurring in deeper regions can be visualized by setting an appropriate probe rotation angle.
机译：提出了一种涡流阵列探针方法，以在多向碳纤维增强塑料中显示发生的分层。首先，通过线圈阵列探针扫描具有近表面分层的样品，该线圈阵列探针包括单个驱动器线圈和多个拾取线圈，并通过信噪比评估分层的可检测性。 An appropriate selection of the image phase and the distance between the driver and pickup coils enabled detection of the delamination suppressing the signal variation in the non-defective region.此外，实验结果表明，驱动器线圈与最敏感的拾取线圈之间的距离与分层尺寸相关。其次，阵列探针技术用于检测位于各种深度的分层。发现分层的可检测性受到阵列探针的旋转角度的强烈影响。最佳探针旋转角度依赖于分层的深度，表明可以通过设定适当的探针旋转角度来可视化在更深区域中发生的分层。

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