Ultrasonic detection of incorporation of structure and function composite with metamaterials
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摘要: 对一种含超材料的结构功能一体化复合材料试块进行了超声C扫描和A扫描检测。针对5 MHz探头无法检出近表面分层及15 MHz探头声波无法穿透试块的问题，研发定制了具备高分辨力和高穿透力的超声换能器，建立了适用于含超材料的结构功能一体化复合材料的超声检测方法和特征缺陷判定方法，并对某典型结构件开展了实际检测。结果表明：超声喷水式穿透法可以有效检测出分层、脱黏等缺陷，适合制造阶段的检测；使用定制的改进型高频探头进行接触式检测，能可靠、直观地检测出材料的内部结构和缺陷信息，适合装配和在役阶段的检测。Abstract: Ultrasonic C-scan and A-scan tests were carried out on a kind of structure function integrated composite sample containing metamaterials. Aiming at the problem that the 5 MHz probe can not detect the near surface delamination and the wave of 15 MHz probe can not penetrate the sample, the ultrasonic transducer with high resolution and high penetration has been developed and customized. The ultrasonic testing method and characteristic defect determination method applicable to the structure function integrated composite materials containing metamaterials have been established, and the actual testing of a typical structural part has been carried out. The results show that the ultrasonic water jet penetration method can effectively detect defects such as delamination and debonding, which is suitable for the detection in the manufacturing stage; Using the customized improved high-frequency probe for contact reflection detection can reliably and intuitively detect the internal structure and obtain the defect information of materials, which is suitable for assembly and in-service detection.
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Keywords:
- metamaterial /
- magnetic micro structure /
- composite material /
- ultrasonic detection
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