Simulation and Experimental Research of Sheet Metal Defect Detection Based on Ultrasonic Lock-in Thermography

Abstract:

Sheet metal is used widely, but the defect inside the sheet metal will affect the use security. Ultrasonic lock-in thermography as a nondestructive testing method can be used in defect dectection. This paper, focusing on the Q235 sheet metal, regards the heat conduction process as sound-machine-thermo energy coupling process, establishes the finite element simulation model, and experiments are performed to validate the built simulation model. The result shows ultrasonic lock-in thermography is fit for testing inside defects of sheet metal.

• Periodical: Advanced Materials Research (Volumes 602-604)
• Pages: 2283-2286
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.602-604.2283
• Online since: December 2012
• Authors: Lei Qin, Jun Yan Liu, Bin Jiang
• Keywords: Finite Element (FE) Simulation, Nondestructive Testing (NDT), Ultrasonic Lock-in Thermography

References

[1] Maldague X.P.V. Theory and Practice of Infrared Technology for Non-Destructive Testing. John Wiley-Interscience. 2001，16～25.

[2] G.Busse，M.Bauer，W.Rippel. Quantitative Infrared testing. 1992，154.

[3] M.Morbidini，P. Cawley. The Detectability of Cracks Using Sonic IR. Journalof app. Phy. 2009，105: 1～9.

[4] Wang Xun. Pulse-echo Thermal Wave Imaging of Metals and Composite [D]. Master Thesis, Wayne State Univ. (Applied Physics，2001).