作者：张祥林1, 张祥春2, 谢凯文3, 汤宝平4
作者单位：1. 北京星航机电设备厂, 北京 100074;
2. 中国航空综合技术研究所, 北京 100028;
3. 北京航空制造工程研究所, 北京 100024;
4. 重庆大学机械学院, 重庆 400044
关键词：超声检测; 碳纤维复合材料; 薄板检测; 超声波探头
摘要：
针对碳纤维/树脂基复合材料层压板在航空航天运用中的实际特点,分析了碳纤维/树脂基复合材料层压板的缺陷特征,选择纵波垂直反射法作为检测手段,提出了调整探头晶片后面阻尼块的阻尼系数和在探头前面增加软性透射膜水囊结构等改进超声探头的方法,有效地提高探测信号可识别性和减小探测盲区,有利于用反射信号的相位特征及形状来对缺陷进行定性分析。试验表明,改进后的纵波垂直反射法方便实用,操作性强,能有效地对碳纤维/树脂基复合材料层压板进行缺陷检测。
Ultrasonic testing of carbon fiber/resin-based composite sheet
ZHANG Xiang-lin1, ZHANG Xiang-chun2, XIE Kai-wen3, TANG bao-ping4
1. Beijing Xinghang Mechanism & Electronics Manufacturer, Beijing 100074, China;
2. China Aero-Polytechnic Establishment, Beijing 100028, China;
3. Beiing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China;
4. College of Mechanical Engineering, Chongqing University, Chongqing 400044, China
Abstract: According to the actual characteristics of carbon fiber/resin-based composite laminates in the aerospace applications, the defect characteristics of the composite laminates have been analyzed.The vertical wave reflection method has been chosen as a means of detection, a way to improve the ultrasound probe has been proposed through adjusting the damping coefficient of the damping block behind the probe chip and adding the soft transmission film structure, such as cyst in front of the probe, which has effectively improved the detected signal recognition and reduced the blind spot of detection.This is useful for qualitatively analyzing the defect through the phase characteristics and shape of the reflection signals.Test shows that the improved vertical P-wave reflection method is facilitate and practical, feasible and effective for detecting the defects of carbon fiber/resin-based composite laminates.
Keywords: Ultrasonic testing; Carbon fibre composite materials; Testing for laminose board; Ultrasonic probe
2009, 35(5): 34-37 收稿日期: 2008-12-1;收到修改稿日期: 2009-2-15
基金项目:
作者简介: 张祥林(1978-),男,工程师,主要从事航天领域无损检测工作。
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