Frattura ed Integrità Strutturale (Jul 2012)

Infrared thermography study of the fatigue crack propagation

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

Journal volume & issue
Vol. 6, no. 21
pp. 46 – 53

Abstract

Read online

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.

Keywords