A PGD variable separation approach for the time regularization of digital image correlation

Robin Bouclier (1, 2) , Jean-Charles Passieux (2) , Jean-Noël Périé (2)

1 IMT - Institut de Mathématiques de Toulouse UMR5219
2 ICA - Institut Clément Ader

The aim of this work is to develop a new regularized digital image correlation (DIC) method for time dependent measurements. The unknown time-resolved displacement field is searched for as a sum of products of space and time functions, similarly to the Proper Generalized Decomposition in computational mechanics. It is shown that the space fields are less sensitive to noise as time regularity acts as a physical regularization of the space fields. As a first application, the performance of the proposed method is highlighted on vibration measurement under harmonic excitation in 2D-DIC and stereo-DIC.

Mots clés: digital image correlation; proper generalized decomposition; vibrations; dynamics

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

Robin Bouclier, Jean-Charles Passieux, Jean-Noël Périé. A PGD variable separation approach for the time regularization of digital image correlation. Photomechanics 2018, International conference on full-field measurement techniques and their applications in experimental solid mechanics, Mar 2018, Toulouse, France. ⟨hal-01882485⟩