碳纤维复合材料蜂窝夹层结构的无损检测方法研究

Study on Nondestructive Testing for Carbon Fiber Composite Honeycomb Sandwich Parts

本文介绍了碳纤维复合材料蜂窝夹层结构常见的内部缺陷,这些缺陷的存在将直接影响蜂窝结构的机械性能和工作性能,必须对其进行无损检测。利用超声脉冲反射法对其内部缺陷进行检测作了详细介绍,分别对复合材料蒙皮可能出现的分层、疏松和高空隙率缺陷及蒙皮与蜂窝夹芯之间界面的脱粘缺陷进行检测,对出现的波形进行分析,并判断波形产生的原因,认为超声脉冲反射法对碳纤维复合材料蜂窝夹层结构内部缺陷检测是一种行之有效的方法。

The inner defects in carbon fiber composite honeycomb sandwich parts were introduced in this paper. These defects will directly affect mechanical properties and working performance, so the nondestructive testing must be carried out. The testing for the inner defects using ultrasonic pulsed reflection was described in detail. Meanwhile, the potential delamination,puff,high void content and interfacial debonding between skins and honeycomb were separately tested. The wave patterns were judged and analyzed. It was thought that the testing using ultrasonic pulsed reflection for the inner defects of carbon fiber composite honeycomb sandwich structure was an effective method.