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Article Dans Une Revue Journal of Strain Analysis for Engineering Design Année : 2019

Calibrating thermoelastic stress analysis with integrated digital image correlation: Application to fatigue cracks

Résumé

This article discusses the dual use of digital image correlation and thermoelastic stress analyses for the study of propagating cracks. It is shown that a few critical parameters such as emissivity and the thermoelastic constant required for the latter can be calibrated with the former. A unified framework is introduced, which treats both experimental techniques equally to locate crack tips, and then evaluate stress intensity factors. This framework allows for a detailed and quantitative comparison between both methods. It is found that, for the case at hand, the thermoelastic stress analyses outputs were less noise sensitive while the digital image correlation method was less dependent on calibration. The proposed procedure was very robust for finding the crack tip location for both experimental methods.

Dates et versions

hal-03261225 , version 1 (15-06-2021)

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Citer

Juliette Gamot, Thibaut Lasserre, Louis Richard, Jan Neggers, Nicolas Swiergiel, et al.. Calibrating thermoelastic stress analysis with integrated digital image correlation: Application to fatigue cracks. Journal of Strain Analysis for Engineering Design, 2019, 54 (5-6), pp.320--330. ⟨10.1177/0309324719874924⟩. ⟨hal-03261225⟩
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