Develop Sonic Infrared Imaging NDE for Quantitative Assessment on Damages in Aircraft Composite Structures

Abstract

Sonic IR imaging has been shown great advantages as a NDE technology to detect defects such as cracks in metal/metal alloy structures. However, composites cannot simply be regarded as "black aluminum". The acoustic behavior of composites is quite different from that of metals. This study is to aim at the understanding of the effect of the structures and the relative positions of the sound source and the defect. In this paper, we present our work on developing Sonic IR imaging NDE for aircraft composite structures.

Modeling and Analysis of Vibrothermography of Cracks in Heavy Aluminum Alloy Structures

“…(Non-destructive testing, NDT)研究团队都相继开展 了超声红外检测的研究，并取得了良好的结果 [1][2][3][4][5] 。 VT 适应的材料非常广泛，如金属材料、复合材料、 陶瓷、工程塑料等，可应用于金属闭合裂纹、复合 材料分层、脱粘和撞击损伤等缺陷的无损检测 [6][7][8][9] ， 业已在飞机结构的 NDT 中获得了重要应用 [1,4] …”