Assessment of continuous distribution of wood properties from a low number of samples: Application to the variability of modulus of elasticity between trees and within a tree
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Henri Baillères
Abstract
The aim of this study was to propose an alternative non-deterministic and non-parametric technique for describing continuous variation in modulus of elasticity (E) within and between stems. The material studied consisted of hybrid Eucalyptus (Eucalyptus urophylla×Eucalyptus grandis) stems felled at the age of 59 months. Samples for measuring E were taken along a diameter slab at 1.30 m above ground. The results showed that the proposed reconstruction technique is consistent compared to results from other studies on Eucalyptus. E increases from pith to bark, following a polynomial distribution. Local and tree-averaged E increased with cambial age, following a sigmoidal profile that can be described with five characteristic parameters (E at pith, E at inflection point, E after inflection point, cambial age when latency period ends, and cambial age at inflection point). The tree contributes little to the total variation. The most important changes in E value were found with increasing radial position, with this effect eight-fold more important than the tree effect.
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©2005 by Walter de Gruyter Berlin New York
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Articles in the same Issue
- The prediction of pulp yield using selected fiber properties
- Surface lignin and extractives on hardwood RDH kraft pulp chemically characterized by ToF-SIMS
- NMR studies on Fraser fir Abies fraseri (Pursh) Poir. lignins
- Acid hydrolysis kinetics and identification of erythro and threo α-ethyl ether derivatives of non-phenolic arylglycerol-β-syringyl ether lignin model compounds
- Stabilization of cellulose solutions in N-methylmorpholine-N-oxide (Lyocell dopes) by addition of an N-oxide as sacrificial substrate
- Mechanism of decomposition of peracetic acid by manganese ions and diethylenetriaminepentaacetic acid (DTPA)
- The effect of chlorophorin and its derivative on melanin biosynthesis
- Long-term development of VOC emissions from OSB after hot-pressing
- Assessment of continuous distribution of wood properties from a low number of samples: Application to the variability of modulus of elasticity between trees and within a tree
- Earlywood and latewood elastic properties in loblolly pine
- Combined shear and compression analysis using a modified Iosipescu shear test device. Experimental studies on dry wood
- An approach to viscoelastic behaviour analysis of wood-based panels by an inverse method of characterisation
- The mechanosorptive effect in Pinus radiata D. Don.
- Advances in understanding bioactivity of chitosan and chitosan oligomers against selected wood-inhabiting fungi
- Comparison of quantitative real-time PCR, chitin and ergosterol assays for monitoring colonization of Trametes versicolor in birch wood
- Rate and extent of adsorption of ACQ preservative components in wood
- Prediction of long-term leaching potential of preservative-treated wood by diffusion modeling
