Mechanical characterisation of accordionisated wood, effect of relaxation conditions

Báder, Mátyás és Németh , Róbert (2017) Mechanical characterisation of accordionisated wood, effect of relaxation conditions. PRO LIGNO, 13 (4). pp. 63-70. ISSN 1841-4737

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After longitudinal compression the natural wood will be bent easier. The relaxation after compression results in better properties. The maximum deflection increases with the relaxation time and with the decreasing of the modulus of elasticity (MoE), while the needed force for the same bending also decreases. The bending strength (MoR) changes intensively just with a long-time relaxation. The nanoindentation (NI) showed, that changes can be found also inside the cell walls. The hardness (H) of S2 cell wall layer slightly decreases, while the decrease of indentation modulus (Er) is remarkable.

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