Microwave near-field and far-field imaging of composite plate with hat stiffeners
Microwave near-field and far-field imaging of composite plate with hat stiffeners
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帽形加强筋复合板的微波近场和远场成像
DOI：
10.1016/j.compositesb.2018.10.058
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发表时间：
2019-03-15
影响因子：
13.1
通讯作者：
Pei, Yongmao
中科院分区：
文献类型：
--
作者：
Li, Zhencheng;Zhou, Licheng;Pei, Yongmao
Composite stiffened structures that are widely used in engineering inevitably produce various defects in manufacturing and service. In order to detect them, a microwave nondestructive testing platform is built in this paper, which simply combines near-field and far-field microwave scanning imaging. 0.4 mm metal hole, 0.5 mm and 1 mm inclusions and 0.1 mm thick debonding are detected by high resolution microwave near-field imaging. Internal poor resin infusions defects in 39 mm thick hat stiffener are detected by high penetration microwave far-field imaging. Far-field microwave images the shape and internal structure of stiffener by adjusting stand-off distance. Detection of the fiber wrinkling defects demonstrates the effectiveness of combining near-field and far-field imaging methods, saving 95% of the scan imaging time. Feature-based image stitching technique is adopted to obtain the full-size image of the large stiffened composite structure.
