Abstract
The use of Finite Element meshes in Digital Image Correlation (FE-DIC) is now widespread in experimental mechanics but, so far, FE have been much less used in Stereo-DIC. The first goal of this paper is to explain in detail how to use FE in Stereo-DIC by means of a formulation in the world coordinate system. More precisely, the paper describes how to calibrate possibly non-linear model of cameras and to measure shapes and displacements with an FE mesh. It also shows that, with such a framework, it is possible to regularize the measurement with an FE model based on the same mesh. For instance, using this technique, it is possible to measure the rotation field of a bending plate in addition to its displacement.
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This work was funded by the French “Agence Nationale de la Recherche” under the grant ANR-12-RMNP-0001 (VERTEX project).
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Pierré, JE., Passieux, JC. & Périé, JN. Finite Element Stereo Digital Image Correlation: Framework and Mechanical Regularization. Exp Mech 57, 443–456 (2017). https://doi.org/10.1007/s11340-016-0246-y
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DOI: https://doi.org/10.1007/s11340-016-0246-y