By evolving nondestructive timber measurement methods, we can obtain information about wood mechanical and physical properties of growing trees. The dynamic modulus of elasticity (MOE) is obtained by calculating two parameters: sound velocity and wood density. In this study, the acoustic tomography “Arbotom 3D” used to measure the stress wave velocity of standing tree and logs, while “Lignostation” device – the wood density. Static modulus of elasticity and bending strength was measured by standard bending tests. 7 model trees of Norway spruce have been selected and three logs (2.1 m long) – but log, middle log and top log – were sampled from each tree. Analysing relationship between the static MOE and other measured spruce wood properties was found that the static MOE has stronger relationships with sound velocity (R2 = 0.46), than with wood density (R2 = 0.05). Moderate relationship was found between dynamic and static elastic modulus (R2 = 0,49). One of the strongest relation was between static MOE and static bending (R2 = 0.77).
Keywords: Bending strength, dynamic MOE, static MOE
Authors
Šilinskas B.
Forest Resources, Economics and Policy Department, Institute of Forestry, Lithuanian Research Centre for Agriculture and Forestry
Aleinikovas M.
Forest Resources, Economics and Policy Department, Institute of Forestry, Lithuanian Research Centre for Agriculture and Forestry
Škėma M.
Forest Resources, Economics and Policy Department, Institute of Forestry, Lithuanian Research Centre for Agriculture and Forestry
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