Finite Element Stereo Digital Image Correlation: Framework and Mechanical Regularization

Abstract : 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.
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Experimental Mechanics, Society for Experimental Mechanics, 2017, 39, pp.1282 - 456. <10.1007/s11340-016-0246-y>
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Jean-Emmanuel Pierré, Jean-Charles Passieux, Jean-Noël Périé. Finite Element Stereo Digital Image Correlation: Framework and Mechanical Regularization. Experimental Mechanics, Society for Experimental Mechanics, 2017, 39, pp.1282 - 456. <10.1007/s11340-016-0246-y>. <hal-01491444>

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