Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8147036 | Infrared Physics & Technology | 2015 | 9 Pages |
Abstract
In this work, an extension laser beam was used as heating source to evaluate the composite material by active thermographic method. In particular, a series of carbon-fiber-reinforced polymer (CFRP) specimens with various depth and sizes of flat-bottom holes (FBH) were inspected using lock-in thermography (LIT). The quantitative LIT phase was employed to identification the subsurface defect using the phase decision threshold (PDT, a phase deference between defective area and the sound one), and then the detectable and undetectable defects were expressed as 1 and 0 (hit/miss data), respectively. The POD curves of continuous phase response data and the hit/miss data processing were used for estimation the detection capability and reliability of LIT phase image for NDI&E of CFRP composites, and the effects of PDT value and modulation frequency on POD curves were compared.
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Authors
Liu Junyan, Liu Yang, Wang Fei, Wang Yang,