Use of Ultrasound Excited Thermography Applied to Massive Steel Components: Emerging Crack Detection Methodology
Publication: Journal of Bridge Engineering
Volume 18, Issue 6
Abstract
In the field of nondestructive testing of structural components, active thermography methods are increasingly in demand. The most experience is available in testing of carbon-fiber-reinforced plastic (CFRP) or similar types of composite material. One of the emerging techniques is ultrasound excited thermography, which has not been fully transferred to massive steel members used in constructional steelwork thus far. The idea of ultrasound excitation is to generate elastic waves that propagate inside the investigated structure. In case of internal flaws, such as cracks, the boundary faces move relative to each other. The resulting rubbing and clapping of crack faces generate frictional heat, which is detected by means of an infrared camera. This paper demonstrates the usage of high-frequency mechanical excitation to detect cracks in hot-rolled girders and reduced plate specimens. The ultrasonic lock-in and the ultrasonic sweep thermography approaches are presented. Localized heating of the crack regions and distributed heating patterns caused by material damping can be observed. The influences of the tuned frequency and the crack depth as well as effects of prestressing and repeated excitation are discussed. In addition to experimental results, a finite-element simulation of the thermostructural problem is conducted. The model can be easily adjusted to match the experimental results of a performed ultrasonic sweep thermography.
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Acknowledgments
The authors gratefully acknowledge the financial support of this project by the German Research Foundation (DFG). The investigated girder shown in Fig. 3 was provided by the Institute for Steel Structures at Aachen University, Germany.
References
ANSYS LS-DYNA 12.0 [Computer software]. Canonsburg, PA, ANSYS, Inc.
Bolu, G., Gachagan, A., Pierce, G., and Harvey, G. (2010). “Reliable thermosonic inspection of aero engine turbine blades.” Insight, 52(9), 488–493.
Chen, J. C., Kephart, J., Lick, K., and Riddell, W. T. (2007). “Crack growth induced by sonic IR inspection.” Nondestructive Test. Eval., 22(2–3), 83–92.
Dillenz, A., Busse, G., and Wu, D. (1999). “Ultrasound lock-in thermography: Feasibilities and limitations.” Proc. SPIE, 3827(10), 10–15.
Gleiter, A., Spiessberger, C., and Busse, G. (2007). “Improved ultrasound activated thermography using frequency analysis.” Quantitative InfraRed Thermogr. J., 4(2), 155–164.
Han, X., et al. (2004). “Acoustic chaos for enhanced detectability of cracks by sonic infrared imaging.” J. Appl. Phys., 95(7), 3792–3797.
Han, X., Favro, L. D., and Thomas, R. L. (2005). “Finite-element modeling of acoustic chaos to sonic infrared imaging.” J. Appl. Phys., 98(1), 014907.
Henneke, E. G., Reifsnider, K. L., and Stinchcomb, W. W. (1979). “Thermography: An NDI method for damage detection.” J. Met., 31(9), 11–15.
Homma, C., Rothenfusser, M., Baumann, J., and Shannon, R. (2006). “Study of the heat generation mechanism in acoustic thermography.” Proc., Quantitative Nondestructive Evaluation, Vol. 820, American Institute of Physics, College Park, MD, 566–573.
Lu, J., Han, X., Newaz, G., Favro, L. D., and Thomas, R. L. (2007). “Study of the effect of crack closure in sonic infrared imaging.” Nondestructive Test. Eval., 22(2–3), 127–135.
Mabrouki, F., Thomas, M., Genest, A., and Fahr, A. (2009). “Frictional heating model for efficient use of vibrothermography.” NDT Int., 42(5), 345–352.
Mabrouki, F., Thomas, M., Genest, A., and Fahr, A. (2010). “Numerical modeling of vibrothermography based on plastic deformation.” NDT Int., 43(6), 476–483.
Mian, A., Newaz, G., Han, X., Mahmood, T., and Saha, C. (2004). “Response of sub-surface fatigue damage under sonic load: A computational study.” Compos. Sci. Technol., 64(9), 1115–1122.
Mignogna, R. B., Green, R. E., Duke, J. C., Henneke, E. G., and Reifsnider, K. L. (1981). “Thermographic investigation of high-power ultrasonic heating in materials.” Ultrasonics, 19(4), 159–163.
Pieczonka, L. J., Staszewski, W. J., Aymerich, F., Uhl, T., and Szwedo, M. (2010). “Numerical simulations for impact damage detection in composites using vibrothermography.” IOP Conf. Series: Mater. Sci. Eng., Vol. 10, IOP Publishing.
Plum, R., and Ummenhofer, T. (2009). “Ultrasound excited thermography of thick-walled steel load bearing members.” Quantitative InfraRed Thermogr. J., 6(1), 79–100.
Plum, R., and Ummenhofer, T. (2010). “Structural-thermal FE simulation of vibration and heat generation of cracked steel plates due to ultrasound excitation used for vibrothermography.” Proc., Quantitative InfraRed Thermography, E. du CAO, Les Eboulements, Quebec, Canada, 763–770.
Polimeno, U., and Almond, D. P. (2009). “A compact thermosonic inspection system for the inspection of composites.” Proc., Int. Conf. on Composite Materials, International Committee on Composite Materials, Vancouver, Canada.
Rantala, J., Wu, D., Salerno, A., and Busse, G. (1997). “Lock-in thermography with mechanical loss angle heating at ultrasonic frequencies.” Proc., Quantitative InfraRed Thermography, Edizioni ETS, Pisa, Italy, 389–393.
Renshaw, J., Holland, S. D., and Thompson, R. B. (2008). “Measurement of crack opening stresses and crack closure stress profiles from heat generation in vibrating cracks.” Appl. Phys. Lett., 93(8), 081914.
Thompson, M. K. (2006). “Methods for the generation of rough surfaces in ANSYS.” Proc., Int. ANSYS Conf., ANSYS, Inc., Canonsburg, PA.
Zweschper, T., Riegert, G., Dillenz, A., and Busse, G. (2003). “Ultrasound burst phase thermography (ubp) for applications in the automotive industry.” Proc., AIP Conf., Vol. 657, American Institute of Physics, College Park, MD, 531–536.
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Information
Published In
Journal of Bridge Engineering
Volume 18 • Issue 6 • June 2013
Pages: 455 - 463
Copyright
© 2013 American Society of Civil Engineers.
History
Received: May 27, 2011
Accepted: Dec 5, 2011
Published online: Dec 7, 2011
Published in print: Jun 1, 2013
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