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23 March 2001 Progress in thermosonic crack detection
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Abstract
We describe progress in thermosonic crack detection. In this technique, a short single pulse of ultrasound is used to cause cracks to heat up and become visible in the infrared. A low frequency (say 10's of kHz) ultrasonic transducer infuses the sample with sound. Where cracks, disbonds, delaminations or other defects are present, the sound field causes the defect to heat locally. The technique is applicable to large and irregularly shaped objects. We present illustrative applications of this technology to aerospace, and automotive inspections.
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Lawrence D. Favro, Xiaoyan Han, Zhong Ouyang, and Robert L. Thomas "Progress in thermosonic crack detection", Proc. SPIE 4360, Thermosense XXIII, (23 March 2001); https://doi.org/10.1117/12.421046
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