Characterization of Early Fatigue Damage in Welded Structures by Thermal Imaging

Justus Medgenberg; Thomas Ummenhofer

doi:10.4028/www.scientific.net/KEM.348-349.297

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Study on Crack Propagation Behavior of Asphalt Concrete under Uniaxial Compression Load by Using CT
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Stochastic Improvement of the Residual Strength of a Stiffened Panel
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HomeKey Engineering MaterialsKey Engineering Materials Vols. 348-349Characterization of Early Fatigue Damage in Welded...

Characterization of Early Fatigue Damage in Welded Structures by Thermal Imaging

Abstract:

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.

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Periodical:

Key Engineering Materials (Volumes 348-349)

Pages:

297-300

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.348-349.297

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Online since:

September 2007

Authors:

Justus Medgenberg, Thomas Ummenhofer

Keywords:

Cyclic Plasticity, Fatigue Crack, Fatigue Damage, Infrared Thermography (IRT), Thermoelastic Stress Analysis, Welded Structures

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