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

Gauvin, C. (2014) Hygromechanical Behaviour of a Wooden Panel: Monitoring Using Image Correlation Techniques and Continuous Weighting. The First Iranian International Training Seminar on Timber Engineering and Wood in Constructions, Karaj, Iran, 13-14 May 2014.

Abstract

Wooden panel 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 permanently cupped panel. In the presentation we will introduce the first step , where the sorptional 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.
• Subjects: T Technology > TJ Mechanical engineering and machinery
• College/School: College of Arts & Humanities > School of Culture and Creative Arts > History of Art