On the Validation of A Priori Estimates of Standard Displacement Uncertainties in T3-Stereocorrelation

C Minguet (1) , F. Soulas (1) , T Lafargue-Tallet (2, 3) , E Chalumeau (3) , M Pommies (3) , R Peiffer (2) , François Hild (4)

1 Eikosim
2 MBDA - MBDA France
3 ALPhANOV
4 LMT - Laboratoire de mécanique et technologie

Uncertainty quantification is crucial for any measurement technique. The present work aims at validating a priori estimates of displacement uncertainties. Images acquired prior to fourteen thermomechanical tests were analyzed via FE-based stereocorrelation to determine actual displacement uncertainties, which were compared to a priori estimates. For the studied experimental database, a very good agreement was observed between a priori and a posteriori estimates of standard displacement uncertainties.

Mots clés: Covariance matrix; Displacement; Uncertainty quantification

Domaines: Mécanique des matériaux [physics.class-ph]

C Minguet, F. Soulas, T Lafargue-Tallet, E Chalumeau, M Pommies, et al.. On the Validation of A Priori Estimates of Standard Displacement Uncertainties in T3-Stereocorrelation. Measurement Science and Technology, 2021, 32 (2), pp.024004. ⟨10.1088/1361-6501/abafe1⟩. ⟨hal-02916960⟩