Crack detection using sonic infrared imaging in steel structures: experiments and theory of heating patterns

Multi-Wave and Hybrid Imaging Techniques: A New Direction for Nondestructive Testing and Structural Health Monitoring

“…This method is unique compared to other thermal methods, since the excitation source is not a heat source, but a sonic one. The testing technology is variously described in the literature as sonic infrared (Sonic-IR/SIR) [ 43 – 45 ], thermo-sonic [ 46 , 47 ], acoustic thermography [ 48 ], etc. The principle of crack detection by the sonic-IR technique [ 49 ] is shown in Figure 17 , in which a short burst of high power acoustical energy is launched by an ultrasonic emitter.…”

“…As one of the pioneering groups in sonic IR technique, researchers at Wayne State University have also paid much attention to the damage assessment in civil structures [ 45 , 56 ]. Effective monitoring techniques for these large sized structures are necessary and urgent.…”

Evaluation of SonicIR handheld system on composite impact damage detection

“…We have demonstrated its wide applications to different types of materials and structures in metal/metal alloy and composites, and detection of various types of defects: surface, subsurface, cracks, delaminations/disbonds. Some of the authors have showed their work in these applications [7][8][9][10][11][12][13][14]. Along the path of the development of this technology, we have studied the effect of the input UT source transducer frequency, heating mechanism of certain types of defects, the role of coupling materials, the non-linear phenomena, the effect of crack closure, etc.…”

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

“…Sonic IR imaging combines ultrasound excitation of a short pulse (typically a fraction of a second) and wide-area infrared imaging. It has been shown its advantages as a fast, wide-area NDE technology to detect defects such as cracks, delamination, and disbonds in materials and structures [1][2][3][4][5][6][7][8]. Even though Sonic IR imaging is the youngest member in the NDE tools, research and development on this technology have been carried out by several groups of researchers in the recent years [9][10][11][12][13][14][15][16][17][18][19].…”

“…Those types of damage are very often subsurface defects located at certain depths [20][21][22][23][24][25]. In the previous work on Sonic IR Imaging with composite materials, some of the authors had worked on some small-scale composite samples [7][8][9][10][11]. Ultrasound waves attenuate much more in composite materials such as carbon fiber reinforced laminated structures than in metal/metal alloy structures [23].…”