Selected Publication:

Pramreiter, M; Stadlmann, A; Linkeseder, F; Keckes, J; Muller, U.
(2020): Non-destructive Testing of Thin Birch (Betula pendula Roth.) Veneers
BIORESOURCES. 2020; 15(1): 1265-1281. FullText FullText_BOKU

Abstract:

In technical applications of wood-based composites, the predictability of elasticity and strength is important. The aim of this study was to predict the static modulus of elasticity and tensile strength of thin (0.55 mm +/- 0.05 mm) birch veneers. Based on the dynamic modulus of elasticity estimated via means of wave transmission time the observed dynamic modulus of elasticity was on average 14% lower than the corresponding static modulus of elasticity. This difference could be explained by a decreased measuring area during the tensile testing or by defects within the samples. The dynamic modulus of elasticity correlated well with the static modulus of elasticity (r = 0.821). Therefore, using wave transmission time to non-destructively predict the elasticity of veneers proves to be a promising tool. The dynamic modulus of elasticity showed a significant and positive correlation with the tensile strength (r = 0.665), but this correlation was weaker than with the static modulus of elasticity. Therefore, the wave transmission time or the static modulus of elasticity must be combined with additional strength-influencing properties, such as fiber angle or density, to allow for a highly accurate prediction of tensile strength.

Authors BOKU Wien:

Linkeseder Florian

Müller Ulrich

Pramreiter Maximilian

Stadlmann Alexander

Find related publications in this database (Keywords)

Dynamic modulus of elasticity

Elastic properties

Static modulus of elasticity

Strength

Stress wave propagation

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