Enhanced microwave waveguide probe-based methods for damage detection of GFRP composites

IF 4.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Ndt & E International Pub Date : 2025-10-07 DOI:10.1016/j.ndteint.2025.103572

Zhen Li , Zhaozong Meng , Fei Fei , Constantinos Soutis

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Abstract

The aim of this work is to enhance the microwave waveguide-based non-destructive detection of glass fibre-reinforced polymer (GFRP) composites by introducing new strategies for probe design and signal processing. The tapering geometry in the waveguide probe design improves the spatial resolution and sensitivity, and the additive manufacturing technique employed reduces the overall cost. In addition, a new approach is proposed for the optimal selection of the inspection frequency in the analysis of the raw frequency-domain data, which achieves high signal contrast. The spatial Fourier transform is introduced to eliminate the undesirable stand-off distance effect in the conventional waveguide-based inspection. Test samples with subsurface grooves and impact-induced damage were examined. It was found that a 1 mm wide groove at a depth of 9 mm and a 10 J barely visible impact damage were well detected and characterised. The results demonstrate the significant potential of microwave testing for the evaluation of composite structures.

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基于增强微波波导探头的玻璃钢复合材料损伤检测方法

本研究的目的是通过引入新的探针设计和信号处理策略，提高基于微波波导的玻璃纤维增强聚合物（GFRP）复合材料无损检测技术。波导探头设计中的锥形几何结构提高了空间分辨率和灵敏度，采用增材制造技术降低了总体成本。此外，在原始频域数据分析中，提出了一种检测频率的优化选择方法，实现了高信号对比度。引入空间傅里叶变换，消除了传统波导检测中存在的不良距离效应。测试样品具有地下沟槽和冲击损伤。结果发现，在9毫米深的1毫米宽沟槽和10 J几乎不可见的冲击损伤被很好地检测和表征。结果表明，微波测试对复合材料结构的评价具有巨大的潜力。

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

Ndt & E International 工程技术-材料科学：表征与测试

CiteScore

7.20

自引率

9.50%

发文量

121

审稿时长

55 days

期刊介绍： NDT&E international publishes peer-reviewed results of original research and development in all categories of the fields of nondestructive testing and evaluation including ultrasonics, electromagnetics, radiography, optical and thermal methods. In addition to traditional NDE topics, the emerging technology area of inspection of civil structures and materials is also emphasized. The journal publishes original papers on research and development of new inspection techniques and methods, as well as on novel and innovative applications of established methods. Papers on NDE sensors and their applications both for inspection and process control, as well as papers describing novel NDE systems for structural health monitoring and their performance in industrial settings are also considered. Other regular features include international news, new equipment and a calendar of forthcoming worldwide meetings. This journal is listed in Current Contents.