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Maderas. Ciencia y tecnología

versão On-line ISSN 0718-221X

Resumo

FU, Zongying et al. Effects of saturated vapor pre-steaming on drying strain in Asian White Birch: Experimentation and modelling. Maderas, Cienc. tecnol. [online]. 2019, vol.21, n.1, pp.77-88. ISSN 0718-221X.  http://dx.doi.org/10.4067/S0718-221X2019005000107.

The effect of low pressure saturated vapor pre-steaming on restrained shrinkage strain, mechano-sorptive creep and the distribution of moisture content was investigated during conventional drying of wood discs. Mechano-sorptive creep was furthermore modelled by artificial neural network theory with five inputs, i.e., pre-steaming and drying temperatures, wood moisture content, relative humidity and distance from the pith. Results revealed that, pre-steaming partly reduced the variation of moisture content distribution along radial direction, increased restrained shrinkage strain in heartwood and decreased in sapwood and slightly decreased the mechano-sorptive creep. The neural network model provided reasonable prediction results, namely, the coefficient of determination for training, validation and test sets greater than 0,95.

Palavras-chave : Artificial neural network; Betula platyphylla; mechano-sorptive creep; restrained shrinkage strain; white birch discs.

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