Studiu privind influența zonei de evaluare asupra determinării modului de elasticitate din încovoiere la panourile din lemn
Andreea Hegyi, Carmen Dico, Gabriela Călătan
Rezumat/Abstract. Achieving glued laminated timber panels is a process that contributes to the efficient use of wood, making possible to obtain quality products from a raw material of lower quality. Since was observed differences in the evaluation of bending behavior of the wood elements, depending on the norm in whose area belongs, in this paper is presented a study on the influence of evaluation area on determining the bending modulus of elasticity to the wood panels. The purpose of this paper is to draw attention to the importance of correct choice of evaluation/method standard, as well as understanding and interpretation of the experimental results. The used materials were beech glued panels, with the wood fiber arranged in the longitudinal direction of the board respectively, in the transversal direction of the board. The mechanical characteristics of the bending behavior were determined according to EN 789, respectively to EN 408, by analogy. Based on experimental results it has been analyzed the influence of evaluation area on the recorded parameters and discussed their local or global nature. In conclusion, it should be underlined the importance of correct framing of the tested element in the properly standard method and correct understanding of the evaluated parameters and their reporting and interpretation.
Cuvinte cheie/Key words: glued laminated timber panels, bending strength, bending modulus of elasticity
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