Effects of Steam-bending on Deformation Properties of Wood

Abstract

Wood with improved deformable properties such as bending, deflection and ductility, has the potential for new functions in wooden furniture. Therefore, research to improve the deformation properties of wood is essential. In this study, we evaluated deformation properties of wood specimens that were subjected to “steam-bending”, in which longitudinal compression was applied by bending the specimen using the Thonet method, a wood bending technology. Two methods of steam-bending were used: one using the conventional bending mold of the Thonet method, and the other using a bending roller newly devised. Subsequently, after bending, the total length of the specimens decreased, and the static Young's modulus decreased. Vibration tests indicated an increase in the logarithmic decrement owing to the steam-bending process. A decrease in Young's modulus was also observed under the combined Thonet method with a bending roller.