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Author (up) Almeras, T.; Gril, J.; Yamamoto, H. openurl 
  Title Modelling anisotropic maturation strains in wood in relation to fibre boundary conditions, microstructure and maturation kinetics Type Journal Article
  Year 2005 Publication Holzforschung Abbreviated Journal Holzforschung  
  Volume 59 Issue 3 Pages 347-353  
  Keywords anisotropy; boundary conditions; cell-wall maturation; growth strain; multilayer model; residual stress; wood fibre  
  Abstract A generalisation of existing mechanical models is proposed to account for the relation between wood macroscopic properties and fibre microstructure and chemical composition. It is applied to understanding of the origin of anisotropic maturation strains measured at the outermost surface of the xylem. Various assumptions are considered for boundary conditions of the fibre during the progressive maturation process and are applied to experimental data from the literature. Assumptions that the fibre is fully restrained in displacement, or fully unrestrained or unrestrained in the transverse direction only are all incompatible with observations. Indeed, within the tree, the fibre is restrained in the longitudinal and tangential directions, but unrestrained in the radial direction towards the bark. Mixed boundary conditions must be introduced to correctly simulate both longitudinal and tangential maturation strains. In the context of an analytical axisymmetric model, this is estimated by considering a parameter of partial release of tangential stress during maturation. Consistence with data and with finite element computation in the case of a square fibre confirmed that, because of the unrestrained radial condition, a large part of the tangential maturation stress is released in situ.  
  Address Nagoya Univ, Grad Sch Bioagr Sci, Lab Biomat Phys, Chikusa Ku, Nagoya, Aichi 4648601, Japan, Email:  
  Corporate Author Thesis  
  Publisher WALTER DE GRUYTER & CO Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0018-3830 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:000228828800016 Approved no  
  Call Number EcoFoG @ eric.marcon @ Serial 256  
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