Identifying the Characteristics of Laminated Wood Based on the Values of Deflection Measured during its Bending

Daniel Ruman, Vladimír Záborský, Tomáš Svoboda, Václava Kašičková, Veronika Rodrová

Abstract


This article is aimed at verifying the influence of selected factors (wood species, lamella combination, type of adhesive, number of loading cycles) on the deflection at the proportionality limit YE, deflection at the point of rupture YMOR, and the ratio between the deflection at the proportionality limit and the deflection at the point of rupture YE :YMOR. All of the monitored characteristics were evaluated on test specimens made from lamellas of beechwood (Fagus sylvatica L.) and aspen wood (Populus tremula L.). The laminated wood consisted of a combination of lamellas that were non-densified and densified to 10% and 20% of their original thickness. Two types of adhesives were used for the research: polyvinyl acetate (PVA) glue and polyurethane (PUR) glue. The results create a database of information that can be used in developing materials with specified properties for its intended use.

Keywords


Cyclic loading; Laminated wood; Bending strength; Deflection

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