脉冲热像法在航空复合材料构件无损检测中的应用

Pulsed Thermography of Composite Components Used in Aerospace Applications

对红外热像检测技术的原理、特点和国内外应用状况作了简单的介绍,对闪光灯激励脉冲热像法中影响检测的主要参数进行了分析,并针对多种常见的复合材料构件进行了检测研究。研究结果表明:对于薄蒙皮的泡沫夹层结构件和蜂窝夹层结构件,闪光灯激励脉冲热像法能够给出清晰的检测结果和丰富的构件内部信息,可以检测出脱粘缺陷、损伤和蜂窝积水,能够用于雷达罩的在役检测。闪光灯激励脉冲热像法适于检测厚度较薄的层合板构件。

The principle,characteristics and application of infrared thermographic nondestructive testing were described shortly in this paper.The influence of primary parameters in infrared flash thermography testing was analyzed.Experiments on composite components were made.The results of infrared flash thermography testing on foam sandwich structure and honeycomb sandwich structure with thin skin were legible and full of inside information of the structures.The defects of disbonding,impact damage and water in honeycomb core were found in the testing,so infrared flash thermography can be used to test radomes in-service.The results of experiments also show that infrared flash thermography is propitious to nondestructive testing of thin laminate structures.