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Simulating the Hygromechanical Response of Wood: Selected Constitutive Models - Couverture souple

Frandsen, Henrik Lund

 
9783838334608: Simulating the Hygromechanical Response of Wood: Selected Constitutive Models
Couverture souple
ISBN 10 : 3838334604 ISBN 13 : 9783838334608
Editeur : LAP Lambert Academic Publishing, 2010

Synopsis

This PhD thesis treats modeling of the hygromechanical response of wood. To do so it is crucial to have accurate models for the moisture transport. Moisture transport in the cellular structure of wood consists of a combination of water vapor transport and bound water transport. In present work these are modeled as two diffusion equations, which are coupled through sorption. Such a model is able to describe so-called non-Fickian effects. Sorption is known to be hysteretic, which must be taken into account in order to describe changes of the moisture content in relation to water vapor pressure accurately. In present work a new sorption hysteresis model suitable for implementation into a numerical method is developed. The sorption hysteresis model is combined with the multi-Fickian model allowing simultaneous simulation of non-Fickian effects and hysteresis. Furthermore temperature dependencies of the model are considered. The latter part of this work deals with the transverse couplings in creep of wood based on experimental observations. A new orthotropic creep model, which provides directionally independent creep rates, is proposed.

Les informations fournies dans la section « Synopsis » peuvent faire référence à une autre édition de ce titre.

Présentation de l'éditeur

This PhD thesis treats modeling of the hygromechanical response of wood. To do so it is crucial to have accurate models for the moisture transport. Moisture transport in the cellular structure of wood consists of a combination of water vapor transport and bound water transport. In present work these are modeled as two diffusion equations, which are coupled through sorption. Such a model is able to describe so-called non-Fickian effects. Sorption is known to be hysteretic, which must be taken into account in order to describe changes of the moisture content in relation to water vapor pressure accurately. In present work a new sorption hysteresis model suitable for implementation into a numerical method is developed. The sorption hysteresis model is combined with the multi-Fickian model allowing simultaneous simulation of non-Fickian effects and hysteresis. Furthermore temperature dependencies of the model are considered. The latter part of this work deals with the transverse couplings in creep of wood based on experimental observations. A new orthotropic creep model, which provides directionally independent creep rates, is proposed.

Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.

Éditeur
LAP Lambert Academic Publishing
Date d'édition
2010
Langue
anglais
ISBN 10 
3838334604
ISBN 13 
9783838334608
Reliure
Broché
Nombre de pages
140
Coordonnées du fabricant
non disponible
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