Preparation of pleated oak samples and their bending tests at different moisture contents

Gecseg, Péter Pál és Báder, Mátyás (2024) Preparation of pleated oak samples and their bending tests at different moisture contents. In: 11TH HARDWOOD CONFERENCE PROCEEDINGS : Sopron, Hungary, 30-31 May 2024. Hardwood conference proceedings . Soproni Egyetem Kiadó, Sopron, pp. 304-307. ISBN 9789633345184

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Absztrakt (kivonat)

This study presents the steps and results of the longitudinal compression modification process (aka. pleating) and bending tests of sessile oak (Quercus petraea (Matt.) Liebl.) wood. Bending tests were done to determine properties under different moisture conditions. The stress values during compression of the specimens were nearly identical, attributed to proper pre-selection of the specimens. However, significant differences were observed during bending tests. The results of the three samples (pleated and conditioned to 12% moisture content (MC), pleated and frozen with MC above fibre saturation point (FSP), and untreated-conditioned to 12% MC showed significant discrepancies. Regarding modulus of rupture (MoR), the average values were averagely 103.20 MPa for the pleated samples conditioned to 12% MC, 63.26 MPa for the frozen samples, and 136.80 MPa for the untreated sample conditioned to 12% MC. In terms of modulus of elasticity (MoE), the average values were averagely 4.02 GPa, 1.42 GPa and 12.25 GPa, respectively. These results suggest that samples with higher MC can withstand less load but are significantly more flexible, whereas samples with lower MC can withstand greater load but are stiffer. We hope these findings can contribute to better decision-making regarding future wood utilization practices.

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