Measurement of kinematic fields via DIC for impact engineering applications

François Hild (1) , Amine Bouterf (1) , Stéphane Roux (1)

1 LMT - Laboratoire de Mécanique et Technologie

Two dynamic Brazilian tests are analyzed via digital image correlation for acquisition rates equal to 5 and 10 million frames per second. Displacements of the order of 1 mm, velocities of the order of ±250 m/s, and accelerations as high as ±4 × 10^7 m/s^2 are measured with spacetime DIC. Uncertainty quantications enable spacetime DIC to be compared with instantaneous analyses. The gains provided by the temporal regularization are very signicant for the acceleration fields. The observed levels are consistent with a priori estimates.

Mots clés: uncertainty quantication; Spatial registration; Full-field measurements; Temporal registration; Digital Image Correlation

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

François Hild, Amine Bouterf, Stéphane Roux. Measurement of kinematic fields via DIC for impact engineering applications. International Journal of Impact Engineering, 2019, 130, pp.163-171. ⟨10.1016/j.ijimpeng.2019.04.007⟩. ⟨hal-02096299⟩