Résumé
Conservation of paintings of Cultural Heritage on wood panels could gain from using tools of wood science and structural mechanics. Indeed, with a virtual model, prediction of an artwork behavior for various scenarii could help for decision on conservation or restoration acts. Since each artwork is a particular case, it requires an identification step to nurture the model. In this article, we are concerned with a particular restoration act: the partial replacement of a cradle. This study couples an experimental approach (3D stereo-correlation) and a numerical approach (finite elements). The experimental part concerns an optical non-invasive form measurement with digital image correlation, using a projected speckle pattern on the painted panel, with luminance compensation. The numerical part concerns stress evaluation, once the model and the experiments are compared using a geometric mapping and a spatial projection of discrete fields. Using modeling and identification, the simulation attempts to recover the residual stresses in the panel, and allows testing several restoration conditions.