Article: Assessment of mechanical properties subsequent to thermal degradation of commercially available woods in South Asia Journal: International Journal of Materials Engineering Innovation (IJMATEI) 2023 Vol.14 No.3 pp.226 - 243 Abstract: The effect of temperature on the mechanical properties of garjan, rain tree, and gmelina commercially available woods in South Asia is studied. The wood samples are heat treated isochronally for two hours at different temperatures up to 250°C. Evaluation of mechanical properties has been performed by hardness, tensile, compressive and impact tests. Main findings show that the increasing of heat treatment temperature proportionally degrades the mechanical properties of wood except hardness improvement up to 150°C. The decrease of these tensile, compressive and impact property are caused by lower moisture content, evaporation of extractives during heating and vanishing of degradation products of wood components cellulose and especially the hemicelluloses. To supplement the optical behaviour of the experimental wood, samples are also made which follows the decline-like scenario in mechanical properties under heat treatment. The microstructural study confirms that fracture along with cavities within the wood cell wall of the experimental woods occurs through the thermal degradation. Inderscience Publishers - linking academia, business and industry through research

Title: Assessment of mechanical properties subsequent to thermal degradation of commercially available woods in South Asia

Authors: Samiul Kaiser; Shaikh Reaz Ahmed; Mohammad Salim Kaiser

Addresses: Department of Civil Engineering, Bangladesh University of Engineering and Technology, Dhaka, 1000, Bangladesh ' Department of Mechanical Engineering, Bangladesh University of Engineering and Technology, Dhaka, 1000, Bangladesh ' Directorate of Advisory, Extension and Research Services, Bangladesh University of Engineering and Technology, Dhaka, 1000, Bangladesh

Abstract: The effect of temperature on the mechanical properties of garjan, rain tree, and gmelina commercially available woods in South Asia is studied. The wood samples are heat treated isochronally for two hours at different temperatures up to 250°C. Evaluation of mechanical properties has been performed by hardness, tensile, compressive and impact tests. Main findings show that the increasing of heat treatment temperature proportionally degrades the mechanical properties of wood except hardness improvement up to 150°C. The decrease of these tensile, compressive and impact property are caused by lower moisture content, evaporation of extractives during heating and vanishing of degradation products of wood components cellulose and especially the hemicelluloses. To supplement the optical behaviour of the experimental wood, samples are also made which follows the decline-like scenario in mechanical properties under heat treatment. The microstructural study confirms that fracture along with cavities within the wood cell wall of the experimental woods occurs through the thermal degradation.

Keywords: wood; annealing; mechanical; properties; fracture; microstructure; absorbance.

DOI: 10.1504/IJMATEI.2023.133374

International Journal of Materials Engineering Innovation, 2023 Vol.14 No.3, pp.226 - 243

Received: 17 May 2022
Accepted: 02 Jul 2022
Published online: 14 Sep 2023 *

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Title: Assessment of mechanical properties subsequent to thermal degradation of commercially available woods in South Asia

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