Full 3D Measurement of Strain Field by Scattered Light for Analysis of Structures |
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Authors: | A Germaneau P Doumalin J C Dupré |
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Institution: | (1) Laboratoire de Mécanique des Solides, Université de Poitiers, CNRS UMR 6610, S.P.2M.I., Boulevard Marie et Pierre Curie, Téléport 2, BP 30179, 86962 Futuroscope Chasseneuil Cedex, France |
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Abstract: | The studies of structures with complex geometry or non-plane loading impose generally taking into account the mechanical volume
effects. Mechanical data at the core of materials can be obtained by using special devices, generally from X-ray tomography.
In this paper, we present an original volume investigation technique for transparent materials. This technique, easier to
implement, does not require any complex device. It is based on scattered light by randomly distributed marks and provides
three-dimensional images allowing the use of correlation technique, extended to three dimensions. The accuracy of measurement
is evaluated for an imposed rigid body translation and a mechanical homogeneous loading in small and large strains. In conclusion,
an example of application is presented concerning a local mechanical loading of compression in which we make a comparison
with a finite element simulation. |
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Keywords: | DIC Volume analysis 3D strains Transparent materials Scattered light 3D images |
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