A complete methodology for the mechanical diagnosis of statue provided by innovative uses of 3D model. Application to the imperial marble statue of Alba-la-Romaine (France)

Marine Bagnéris (1) , Fabien Cherblanc (2) , Philippe Bromblet (3) , Eloi Gattet (1) , Léonard Gügi (1) , Nicolas Nony (1) , Vincent Mercurio (3) , Anthony Pamart (1)

1 MAP - Modèles et simulations pour l'Architecture et le Patrimoine
2 BIOTIC - Biomécanique des Interactions et de l'Organisation des Tissus et des Cellules
3 CICRP - Centre Interdisciplinaire de Conservation et Restauration du Patrimoine

A multidisciplinary methodology is presented to assess the mechanical behaviour of a marble statue with complex fracture plans and localized cracks. Firstly, a 3D model is generated by photogrammetry. Its underlying geometrical data provide valuable insight for the physical characterisation and the numerical analysis. Indeed, the ultrasound analysis, which is usually impossible on such a complex shape, is achieved thanks to the accurate measures of distance between transmitter and receiver obtained from the 3D geometrical model. Finally, an innovative use of FEM/DEM analysis is proposed to evaluate the mechanical relevance of a non-destructive basing system. Reflecting the advances of this collective work, the resulting pedestal solution is non-conventional since it is safe, not invasive and totally reversible. A particular attention is paid to use mainly open-source numerical tools from 3D acquisition through mechanical analysis in order to enable the reproducibility of the process.

Mots clés: White marble statue; Photogrammetry; 3D model; Ultrasonic velocity; Finite Element Method; Discrete Element Method

Domaines: Matériaux et structures en mécanique [physics.class-ph]; Héritage culturel et muséologie

Marine Bagnéris, Fabien Cherblanc, Philippe Bromblet, Eloi Gattet, Léonard Gügi, et al.. A complete methodology for the mechanical diagnosis of statue provided by innovative uses of 3D model. Application to the imperial marble statue of Alba-la-Romaine (France). Journal of Cultural Heritage, 2017, 28, pp.109-116. ⟨10.1016/j.culher.2017.05.002⟩. ⟨hal-01529338⟩