6533b824fe1ef96bd1280b89
RESEARCH PRODUCT
On relation between J-integral and heat energy dissipation at the crack tip in stainless steel specimens
Giuseppe PitarresiGiovanni MeneghettiMauro Ricottasubject
J-integralMaterials scienceInfraredCrack tip plasticityMechanical EngineeringFracture Mechanicslcsh:Mechanical engineering and machineryEnergy methodlcsh:TA630-695Fracture mechanicslcsh:Structural engineering (General)DissipationFracture MechanicFinite element methodStress (mechanics)Settore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineEnergy methodsThermoelastic dampingMechanics of MaterialsCrack tip plasticity; Energy methods; Fracture Mechanics; J-integral; Thermoelastic Stress AnalysisThermographyRange (statistics)Thermoelastic Stress Analysislcsh:TJ1-1570Composite materialdescription
In this paper, an experimental procedure to evaluate the elastic-plastic J-integral at the tip of a fatigue crack is presented. According to this new approach, the elastic component of the J-integral is derived from Thermoelastic Stress Analysis, 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-06-07 | Frattura ed Integrità Strutturale |