Characterization of Early Fatigue Damage in Welded Structures by Thermal Imaging


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The paper presents background information and experimental results regarding the assessment of fatigue damage in welded steel structures by thermographic investigations of thermomechanical coupling effects. The results confirm the high potential of specialized thermographic methods for the experimental characterization of all stages of fatigue damage in welded and un-welded components. The technique provides a new experimental mean to investigate early inhomogeneous fatigue damage as mesoplasticity and cracks in the weld toe. The method has been successfully applied during fatigue testing of welded components and allows detecting localized damage as early as 10% to 20% of the total fatigue lifetime of the tested specimens.



Key Engineering Materials (Volumes 348-349)

Edited by:

J. Alfaiate, M.H. Aliabadi, M. Guagliano and L. Susmel




J. Medgenberg and T. Ummenhofer, "Characterization of Early Fatigue Damage in Welded Structures by Thermal Imaging", Key Engineering Materials, Vols. 348-349, pp. 297-300, 2007

Online since:

September 2007




[1] M. Bily: Cyclic Deformation and Fatigue of Metals, Vol. 78, Materials Science Monographs, Elsevier (1993).

[2] J. Lemaitre and J. Chaboche: Mechanics of solid materials, Cambridge University Press, Cambridge (1990).

[3] N. Harwood, W.M. Cummings (edt. ): Thermoelastic stress analysis, Adam Hilger (1991).

[4] J.C. Krapez, D. Pacou: Proceedings of SPIE - Thermosense XXIV, pp.435-449 (2002).

[5] J. Medgenberg and T. Ummenhofer: Paper presented at the 8th International Conference on Quantitative Infrared Thermography, June 28-30, Padova, Italy (2006).

[6] J. Medgenberg and T. Ummenhofer: Paper presented at ThermoSense XIX, April 9-13, Orlando, Florida (2007).

[7] G. Pitarresi,. E.A. Patterson: Journal of Strain analysis, Vol. 38 No. 5, pp.405-417 (2003).

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