Finite Element Stereo Digital Image Correlation: Framework and Mechanical Regularization

Jean-Emmanuel Pierré (1) , Jean-Charles Passieux (1) , Jean-Noël Périé (1)

1 ICA - Institut Clément Ader

The use of Finite Element meshes in Digital Image Correlation (FE-DIC) is now widespread in experimental mechanics. Up to now FE have been much less used in Stereo-DIC. The first goal of this paper is to explain in details how to use FE in Stereo-DIC using a formulation in the physical coordinate system. More precisely, it is shown how to perform the calibration of possibly nonlinear models, shape and displacement measurement based on a FE mesh. In addition it is shown that with such a framework it is possible to regularise the measurement with a FE model based on the same mesh. For instance, using this technique, it is shown that it is possible to measure the rotation field of a bending plate in addition to its displacement.

Mots clés: Digital Image Correlation; Plate kinematics; Stereovision; Mechanical Regularization; Finite Element

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

Jean-Emmanuel Pierré, Jean-Charles Passieux, Jean-Noël Périé. Finite Element Stereo Digital Image Correlation: Framework and Mechanical Regularization. Experimental Mechanics, 2017, 57 (3), p.443-456. ⟨10.1007/s11340-016-0246-y⟩. ⟨hal-01491444⟩