玻璃钢/复合材料 ›› 2018, Vol. 0 ›› Issue (4): 32-38.

• 基础研究 • 上一篇    下一篇

CFRP蒙皮-CFRP胶接质量的原位超声检测技术

高晓进, 周金帅, 江柏红   

  1. 航天特种材料及工艺技术研究所,北京100074
  • 收稿日期:2017-11-06 出版日期:2018-04-20 发布日期:2018-04-20
  • 作者简介:高晓进(1987-),男,硕士,主要从事复合材料无损检测方面的研究工作,gao19870311@163.com。

ON-EQUIPMENT ULTRASONIC TESTING TECHNOLOGY OF BONDING QUALITY OF CFRP SKIN-CFRP

GAO Xiao-jin, ZHOU Jin-shuai, JIANG Bai-hong   

  1. Research Institute of Aerospace Special Materials and Processing Technology, Beijing 100074, China
  • Received:2017-11-06 Online:2018-04-20 Published:2018-04-20

摘要: 根据CFRP蒙皮-CFRP胶接结构的特点,采用窄脉冲超声反射法对其胶接质量进行原位检测;仿真分析了胶接结构中胶膜及界面脱粘对超声波反射信号的影响;并用自制的窄脉冲延迟块超声探头对脱粘试块进行检测。仿真分析表明:窄脉冲超声波反射信号能够检测Ⅰ界面脱粘;d/λ(胶膜厚度/超声波波长)≤0.5时,能够检测Ⅱ界面脱粘。实验结果表明:自制的5 MHz探头产生的脉冲周期不大于1.5周,达到窄脉冲的要求;采用超声反射法检测时自制的5 MHz探头能够检测出Ⅰ界面脱粘和厚度不大于0.5 mm胶膜的Ⅱ界面脱粘,满足实际产品的原位检测需求。

关键词: 胶结, 超声, 原位检测, 脱粘

Abstract: According to the characteristics of the bonded structure of CFRP skin-CFRP, short pulse ultrasonic reflecting on-equipment testing method was used to test bonding quality, the influence of bonding film and debonding in structure on ultrasonic reflecting signal were analyzed, and self made short pulse delay block ultrasonic probe was used to test debonding in samples. Simulation results show that, short pulse ultrasonic reflecting signal can test Ⅰ interface debonding Ⅱ interface debonding when d/λ≤0.5. Experiment results show that, the width of pulse produced by self made 5 MHz probe is not larger than 1.5 cycle, which can meet the requirement of short pulse. The self made probe can test Ⅰ interface debonding, and Ⅱ interface debonding when thickness of bonding film is less than 0.5 mm,which can meet on-equipment testing requirement of actual product.

Key words: bonding, ultrasonic, on-equipment testing, debonding

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