Infrared thermography study of the fatigue crack propagation

A.Yu. Fedorova, M.V. Bannikov, M.V. Bannikov, O.A. Plekhov, E.V. Plekhova

Abstract


The work is devoted to the experimental study of heat dissipation process caused by fatigue crack propagation. To investigate a spatial and time temperature evolution at the crack tip set of experiments was carried out using specimens with pre-grown centered fatigue crack. An original mathematical algorithm for experimental data treatment was developed to obtain a power of heat source caused by plastic deformation at crack tip. The algorithm includes spatial-time filtration and relative motion compensation procedures. Based on the results of mathematical data treatment, we proposed a way to estimate the values of J-integral and stress intensity factor for cracks with pronounced the plastic zone.

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DOI: http://dx.doi.org/10.3221%2FIGF-ESIS.21.06