Infrared Thermography for In-situ Nondestructive Testing of Airplane Composite
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摘要: 采用闪光灯激励红外热成像无损检测系统(IR-Thermography), 对一组模拟飞机复合材料结构的人工缺陷试件进行了检测。结果表明, 缺陷埋深是决定试验件中人工缺陷检测灵敏度和检测能力的关键因素;只要选取适当的检测工艺参数, 热激励红外成像检测技术能可靠检测出复合材料结构中一定大小和埋深的分层、蒙皮脱粘及蜂窝芯体塌陷等缺陷, 且检测不受工件表面形状的影响, 该技术是一种高效、可靠的飞机复合材料结构原位无损检测方法。Abstract: The infrared thermography (IR-Thermography) inspecting system based on a flash thermography(FT) was applied to the nondestructive testing of a set of composite reference blocks with artificial flaws. As the results showed, the IR-Thermography NDT method is able to provide with a dependable result for the detection of delaminations with stipulated size and depth in laminates, debonds and core crush in honeycomb core sandwich, respectively. Meanwhile, it is proved that the inspection sensitivity and capability is greatly dependant on the depth of defects. Selecting an applicable pumping frequency and time is necessary to acquire a dependable thermal image in practical inspection. It is finally concluded that the IR-Thermography is a high-performance in-situ NDT method of Airplane composite panels.
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Keywords:
- Composite /
- Infrared thermography /
- In-situ NDT
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