复合材料科学与工程 ›› 2020, Vol. 0 ›› Issue (6): 79-83.

• 应用研究 • 上一篇    下一篇

傅里叶变换在玻璃钢复合材料胶接质量检测中的应用

郑金华1,2, 冯君伟1,2, 盛涛1,2, 钱云翔1,2
本文作者还有常舰1, 吴鑫锐1。   

  1. 1.上海复合材料科技有限公司,上海201112;
    2.上海航天树脂基复合材料工程技术研究中心,上海201112
  • 收稿日期:2020-03-18 出版日期:2020-06-28 发布日期:2020-06-28
  • 作者简介:郑金华(1988-),男,研究生,主要从事射线、超声、红外检测技术方面的研究,464996467@qq.com。

APPLICATION OF FAST FOURIER TRANSFORM IN FRP COMPOSITE MATERIAL BONDING QUALITY INSPECTION

ZHENG Jin-hua1,2, FENG Jun-wei1,2, SHENG Tao1,2, QIAN Yun-xiang1,2   

  1. 1. Shanghai Composite Materials Technology Co. , Ltd. , Shanghai 201112, China;
    2. Shanghai Engineering Research Center of Aerospace Resin Based Composites, Shanghai 201112, China
  • Received:2020-03-18 Online:2020-06-28 Published:2020-06-28

摘要: 通过对钢/玻璃钢的胶接质量的超声信号进行傅里叶变换并分析,发现超声波在钢里面产生了共振。因胶接良好时玻璃钢对超声信号的衰减使得其共振幅值要明显小于脱粘超声信号,再通过对比不同特征下的超声C扫描图像,发现只有在基频幅值下的超声C扫检测效果和常规超声C扫检测效果一致。因此可以通过超声幅-频曲线来评价钢/玻璃钢的胶接界面是否存在脱粘。

关键词: 傅里叶变换, 胶接质量, 超声C扫描, 复合材料

Abstract: In this paper, through the Fourier transform and analysis of the ultrasonic signal of the bonding quality of steel/FRP, it is found that the ultrasonic resonance occurs in the steel. The resonance amplitude of FRP is obviously smaller than that of debonding ultrasonic signal because of the attenuation of ultrasonic signal when the bonding is good. By comparing the ultrasonic C-scan images under different characteristics, it is found that only the ultrasonic C-scan detection effect under the fundamental frequency amplitude is consistent with the conventional ultrasonic C-scan detection effect. Therefore, the ultrasonic amplitude frequency curve can be used to evaluate whether there is debonding at the bonding interface between steel/FRP.

Key words: fourier transform, bonding quality, ultrasonic C-scan, composites

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