Measurement of kinematic fields via DIC for impact engineering applications. (August 2019)

• Record Type: Journal Article
• Authors: Hild, François; Bouterf, Amine; Roux, Stéphane
• Is Part Of: International journal of impact engineering. Volume 130(2019)
• Page Start: 163
• Page End: 171
• Publication Date: 2019-08
• Subjects: Digital image correlation -- Full-field measurements -- Spatial registration -- Temporal registration -- Uncertainty quantification; Impact -- Periodicals; Shock (Mechanics) -- Periodicals; Impact -- Périodiques; Choc (Mécanique) -- Périodiques; Impact; Shock (Mechanics); Periodicals; 620.1125
• DOI: 10.1016/j.ijimpeng.2019.04.007
• Languages: English
• ISSNs: 0734-743X

Abstract

Highlights: dynamic Brazilian tests are analyzed with images acquired at 5 and 10 million fps. Displacements up to 1 mm, velocities up to ± 250 m/s, and accelerations as high as ± 4 × 10 7 m/s 2 are measured with spacetime DIC. uncertainty quantifications on displacements, velocities, acceleration, strains and strain rates. Abstract: 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 quantifications enable spacetime DIC to be compared with instantaneous analyses. The gains provided by the temporal regularization are very significant for the acceleration fields. The observed levels are consistent with a priori estimates.