Coupling numerical and experimental methods to characterise the mechanical behaviour of the Mona Lisa: a method to enhance the conservation of panel paintings

Riparbelli, L.; Dionisi-Vici, Paolo; Mazzanti, Paola; Brémand, Fabrice; Dupré, Jean-Christophe; Fioravanti, Marco; Goli, Giacomo; Helfer, Thomas; Hesser, Franck; Jullien, Delphine; Mandron, Patrick; Ravaud, Élisabeth; Togni, Marco; Uzielli, Luca; Badel, Éric; Gril, Joseph

doi:10.1016/j.culher.2023.06.013

Journal of Cultural Heritage

2023

DOI: 10.1016/j.culher.2023.06.013

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Coupling numerical and experimental methods to characterise the mechanical behaviour of the Mona Lisa: a method to enhance the conservation of panel paintings

L. Riparbelli

Paolo Dionisi-Vici

Paola Mazzanti

et al.

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2024

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Cited by 2 publications

References 31 publications

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Exploring the inner hygro-mechanical behaviour of historical panel paintings: a novel approach using digital twins

Lorenzo,

Paola,

Thomas

et al. 2024

Herit Sci

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Wooden Panel Paintings (WPPs) stand as invaluable cultural artefacts from the past. These works present an intriguing challenge in understanding their complex mechanical behaviour and ensuring their long-term preservation. The present study assumes as founding paradigm the unicity of each WPP, in terms of its material composition, historical background, physical dimensions, and the specific environmental conditions it has been subjected to over time, and their complex behaviour, which requires the knowledge of both mechanical and materials specificity. These characteristics need to be considered, and studied in-depth for each individual WPP, particularly if the aim is to develop a comprehensive understanding of its individual mechanical behaviour. The study provides new computational models calibrated to reproduce the physical and mechanical behaviour of artworks and acting as their 'digital twins'. The models developed contribute significantly to the understanding of the mechanics of these artworks, including the impact of environmental thermo-hygrometric fluctuations and the role of structural elements such as crossbeams. The results, corroborated by experimental analyses, indicate that environmental variations, both short and long term, exert specific and quantifiable effects on the WPPs, and that the presence of crossbeams significantly influences the distribution of stresses within the panel, particularly affecting the pictorial layers that are often the most susceptible to damage. In this context the generated digital twins serve as an invaluable tool, offering the potential to simulate various risk scenarios or to evaluate the effectiveness of engineered conservation interventions on the WPPs.

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Exploring the inner hygro-mechanical behaviour of historical panel paintings: a novel approach using digital twins

Lorenzo,

Paola,

Thomas

et al. 2024

Herit Sci

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An Innovative Method Based on In Situ Deformometric Monitoring to Support Decisions for the Structural Restoration of a Historic Panel Painting

Mazzanti,

Marcon,

Cocchi

et al. 2024

Heritage

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This paper describes an innovative method developed by the authors to support basic decisions concerning the structural restoration of a large historical panel painting which had been damaged by inappropriate attachment to a wall and ongoing exposure to severe changes in environmental humidity. The Lapidazione di Santo Stefano is a large panel (2.78 × 3.92 m2) painted by Giorgio Vasari in 1571 and has been housed since then in the Church of Santo Stefano dei Cavalieri in Pisa (Italy). Its wooden support is made of large horizontal planks glued together along their edges and stiffened by vertical, dovetailed crossbeams. The panel was tightly fastened to a church wall with several rigid bolts; due to the moisture cycling produced by rainwater leakage and a subsequent “compression set”, it had developed severe tension stresses perpendicular to the grain, resulting in cracks affecting both the wood and the paint layers. To decide how to carry out the structural restoration of the panel, it was necessary to know whether slippage could occur between the panel and crossbeams during seasonal variations in environmental humidity. Without slippage, tensile stresses would be generated in the wood and could produce further cracks and damage the paint layers. An in situ monitoring method for assessing the possibility of slippage was developed and implemented. An analysis of data collected over a period of 6 months before the structural restoration confirmed that adequate slippage was possible; hence, the decision to fully repair the cracks was taken. Monitoring continued for a year after restoration and confirmed the previous findings. This paper describes the monitoring method, the equipment used, the results of its implementation and its value as a preventive conservation tool.

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Coupling numerical and experimental methods to characterise the mechanical behaviour of the Mona Lisa: a method to enhance the conservation of panel paintings

Cited by 2 publications

References 31 publications

Exploring the inner hygro-mechanical behaviour of historical panel paintings: a novel approach using digital twins

Exploring the inner hygro-mechanical behaviour of historical panel paintings: a novel approach using digital twins

An Innovative Method Based on In Situ Deformometric Monitoring to Support Decisions for the Structural Restoration of a Historic Panel Painting

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