复合材料的主要缺陷有分层和脱粘等。脉冲红外热成像技术作为一种新型的无损检测技术, 目前在航空航天领域得到了越来越广泛的应用。研究了脉冲红外热成像技术对碳纤维复合材料的检测能力, 通过理论建立评价脉冲红外热成像检测分辨能力的依据, 并且在实验上利用碳纤维复合材料设计了不同深度、不同大小和不同相邻间距的脱粘模拟缺陷, 进行了脉冲红外热成像技术对碳纤维复合材料检测能力的实验研究。实验结果证明脉冲红外热成像技术对于蒙皮厚为1 mm和0.5 mm的预制缺陷均可检测, 通过检测结果分析了缺陷的大小、缺陷的深度和相邻缺陷的间距对检测能力的影响。为脉冲红外热成像检测碳纤维复合材料提供了一定的理论和实验参考。

Composite material is normally affected by anomalies such as delaminations and disbandings. Pulsed thermography is a new non-destructive inspection technology, which has been widely used in aerospace. In this paper, the detectability of pulsed infrared thermography is studied by establishing the theory for the detect ability of carbon fiber reinforced plastics (CFRP). Meanwhile by utilizing the designed specimens buried with different depths, different sizes and different distances between adjacent flaws to represent disbonding and delamination in the CFRP composite material. The detectability of CFRP composites using pulsed infrared thermography is experimentally studied. The results of the experiment show that the designed defects in the CFRP with thickness of 0.5 mm and 1.0 mm are all detected. Meanwhile, the relationship between depth size and distance of adjacent flaws and detectability are analyzed. According to this study, it will provide some theoretical basis and experimental references for the inspection of the CFRP composites.