Hygromechanical Behaviour of a Wooden Panel: Monitoring Using Image Correlation Techniques and Continuous Weighting

Gauvin, C. , Jullien, D. and Gril, J. (2014) Hygromechanical Behaviour of a Wooden Panel: Monitoring Using Image Correlation Techniques and Continuous Weighting. Ecole Doctorale I2S: Doctiss 2014, Montpellier, France, 5 Jun 2014.

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Abstract

Wooden p anel paintings from cultural heritage are excellent case of study for an engineer. They are witness of ancient times and practices , and may provide keys to the understanding of long term behaviour of wooden structures [1 ,2 ] . A particularity of these objects is the permanent cupping of the panel. It seems to appear whatever the orientation of the panel cutting (quatersawn or flatsawn ) and the position of the paint layer. One of the possible origin of this cupping is the compression - set [ 3 ] , due t o a combination of mechano - sorptive and plastic behaviour of wood . This phenomenon is more severe when the panel is restrained, so that shrinkage and swelling are prevented and stress es generated during cycling change s of humidity lead to cracking of the wooden support . For our study, we try to reproduce a panel mock - up, taking care to characterize each component at each step until the final result: a permanent ly cupped panel. In the presentation we will introduce t he first step , where the sorption al and m echanical behaviour of a ‘ naked ’ (uncoated) panel is monitored using image correlation techniques and continuous weighting.

Item Type:Conference or Workshop Item
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Gauvin, Dr Cecilia
Authors: Gauvin, C., Jullien, D., and Gril, J.
Subjects:T Technology > TJ Mechanical engineering and machinery
College/School:College of Arts > School of Culture and Creative Arts > History of Art

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