caa a22 4500 463216717 CHVBK 20180405153158.0 cr unu---uuuuu 170326e20070301xx s 000 0 eng 10.1007/s00226-006-0106-5 doi (NATIONALLICENCE)springer-10.1007/s00226-006-0106-5 A global rheological model of wood cantilever as applied to wood drying [Elektronische Daten] [Mohssine Moutee, Yves Fortin, Mario Fafard] In the process of wood drying inevitable stresses are induced. This often leads to checking and undesired deformations that may greatly affect the quality of the dried product. The purpose of this study was to propose a new rheological model representation capable to predict the evolution of stresses and deformations in wood cantilever as applied to wood drying. The rheological model considers wood shrinkage, instantaneous stress-strain relationships, time induced creep, and mechano-sorptive creep. The constitutive law is based on an elasto-viscoplastic model that takes into account the moisture content gradient in wood, the effect of external load, and a threshold viscoplastic (permanent) strain which is dependent on stress level and time. The model was implemented into a numerical program that computes stresses and strains of wood cantilever under constant load for various moisture content conditions. The results indicate that linear and nonlinear creep behavior of wood cantilever under various load levels can be simulated using only one Kelvin element model in combination with a threshold-type viscoplastic element. The proposed rheological model was first developed for the identification of model parameters from cantilever creep tests, but it can be easily used to simulate drying stresses of a piece of wood subjected to no external load. It can therefore predict the stress reversal phenomenon, residual stresses and maximum stress through thickness during a typical drying process. Springer-Verlag, 2006 Moutee Mohssine Centre de recherche sur le bois (CRB), Département des sciences du bois et de la forêt, Université Laval, G1K 7P4, Québec, QC, Canada aut Fortin Yves Centre de recherche sur le bois (CRB), Département des sciences du bois et de la forêt, Université Laval, G1K 7P4, Québec, QC, Canada aut Fafard Mario Département de génie civil, Université Laval, G1K 7P4, Québec, QC, Canada aut Wood Science and Technology Springer-Verlag 41/3(2007-03-01), 209-234 0043-7719 41:3<209 2007 41 226 https://doi.org/10.1007/s00226-006-0106-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00226-006-0106-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Moutee Mohssine Centre de recherche sur le bois (CRB), Département des sciences du bois et de la forêt, Université Laval, G1K 7P4, Québec, QC, Canada aut NATIONALLICENCE 700 1- Fortin Yves Centre de recherche sur le bois (CRB), Département des sciences du bois et de la forêt, Université Laval, G1K 7P4, Québec, QC, Canada aut NATIONALLICENCE 700 1- Fafard Mario Département de génie civil, Université Laval, G1K 7P4, Québec, QC, Canada aut NATIONALLICENCE 773 0- Wood Science and Technology Springer-Verlag 41/3(2007-03-01), 209-234 0043-7719 41:3<209 2007 41 226 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer