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Short BIo
Ali Bagheri Behboud is a mechanical engineer with a specialising in material characterisation and testing. With a background in experimental mechanics applied to metallic alloys, he is now pursuing a PhD in applied mechanics at TU/e. His research focuses on experimental micromechanics applied to historical oil paints. Ali works in the multiscale lab at TU/e, contributing to innovative research that intersects mechanical engineering and art conservation. |
ABSTRACT
Investigating Micro-Mechanical Behavior of Oil Paints: An Experimental Micromechanics Approach
Ali B.Behboud1*, Johan Hoefnagels2, Suzanne Reus3, Joen Hermans4, Emanuela Bosco1
1 Eindhoven University of Technology, Department of the Built Environment, Eindhoven
2 Eindhoven University of Technology, Department of Mechanical Engineering, Eindhoven
3 Van Gogh Museum, Amsterdam
4 University of Amsterdam, Conservation Science and Chemistry, Amsterdam
The mechanical properties of oil paint are influenced by factors such as paint composition, pigment-to-binder ratio, environmental conditions (temperature and relative humidity), and notably, the age of the paint, which impacts its stiffness and ductility.
This study aims to integrate real-time microscopic inspections with micro-mechanical testing to examine the deformation behaviour of oil paint. Cutting-edge micro-mechanics techniques (Maraghechi et al. 2023), such as micro-tensile testing, facilitate a comprehensive experimental analysis of the stress-deformation response in materials. Furthermore, Digital Image Correlation (DIC) can be employed to identify the local strains in the paint samples during the tests (Maraghechi et al. 2023; Ruybalid et al. 2020). To develop this experimental methodology for investigating the mechanical behaviour of oil paint, model system titanium white samples are prepared on polyester substrates. The samples are then exposed to accelerated thermal ageing for varied periods under carefully controlled temperature and humidity levels.
This study introduces a novel and robust in-situ micromechanics experimental methodology for investigating the micromechanical behaviour and chemical properties (spectroscopic analysis) of oil paint at the micro-scale. The methodology is designed for applicability across various oil paint samples and provides insights into the microstructure of oil paints, linking it to their micromechanical properties.