On relation between J-integral and heat energy dissipation at the crack tip in stainless steel specimens

Giuseppe Pitarresi, Meneghetti, Mauro Ricotta

Risultato della ricerca: Articlepeer review

Abstract

In this paper, an experimental procedure to evaluate the elastic-plastic J-integral at the rip of a fatigue crack is presented. According to this new approach, the elastic component of the J-integral is derived from Thermoelastic Stress flalysis, while the plastic component of the J-integral is derived from the heat energy loss. An analytical link is proposed to apply this new experimental technique. Therefore, the elastic-plastic J-integral range was evaluated starting from infrared temperature maps measured in situ during crack propagation tests of AISI 304L stainless steel specimens. It was found that the range of the infrared thermography-based J-integral correlated well the crack growth data generated in small as well as large scale yielding conditions. Finally, the experimental values of the J-integral were successfully compared with the corresponding numerical values obtained from elastic-plastic finite element analyses.
Lingua originaleEnglish
pagine (da-a)82-96
Numero di pagine15
RivistaFRATTURA E INTEGRITÀ STRUTTURALE
Volume13
Stato di pubblicazionePublished - 2019

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering

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