Acoustic Impedance Test Imaging for Brazed Joint of Honeycomb Structure
-
摘要: 利用声阻法对蜂窝结构钎焊接头质量进行了检测。按照相关标准制作了含人工缺陷的试件，根据声阻检测原理得到检测信号并确定了手动检测工艺。利用手写板提取探头位置信号，通过VC++.NET编写的检测程序与相应的检测信号结合生成声阻C扫描图像，并与超声C扫描检测结果进行对比。试验表明，声阻法工艺简单，检测速度快，可分辨蜂窝结构中约 10 mm的未焊合缺陷。声阻C扫描图像可显示缺陷位置及大小，且其精度达到检测要求。Abstract: he brazed joint of honeycomb structure was tested by acoustic impedance method. The sample with artificial defects was made according to the standard; the testing signal was obtained based on the principle of acoustic impedance test, and then the manual testing process was determined. The -scan image was obtained by combining the location signal of the probe picked up by the handwriting board and the corresponding testing signal by a C++.NET program, and the image was compared with the ultrasonic C-scan result. It was shown that the test process of acoustic impedance method was easy to obtain, and has a high testing speed. The 10 mm debond in the honeycomb structure can be detected by this method. The location and size of the artificial defects was shown in the acoustic impedance C-scan image, and the resolution met the test requirement.
-
-
[1] 徐丽，张幸红，韩杰才.航空航天复合材料无损检测研究现状［J］.材料导报，2005(8)：79-82. [2] CAWLEY P. Sensibility of the mechanical impedance method of non destructive testing［J］. NDT International,1987,20(4):209-215. [3] 李明轩.声阻法检测原理［M］.北京：科学出版社，1976. [4] LIM M K, LOW S C. Dynamic characteristics of dibonds in honeycomb structures［J］. Engineering Structures,1995,17(1):27-38. [5] Hyeung-Yun Kim, Woonbong Hwang. Effect of debonding on natural frequencies and frequency response functions of honeycomb sandwich beams［J］. Composite Structures,2002(55):51-62. [6] 朱淑华，万德胜.铝箔蜂窝结构的声阻检测法［J］.洪都科技,1979(2):23-29. [7] HB 6462-90金属蜂窝胶接结构声振检测标准试块［S］. [8] 郑仁元.传感器应用一百例［M］.北京：电子工业出版社，1986.
计量
- 文章访问数: 2
- HTML全文浏览量: 0
- PDF下载量: 2
下载:
