Modelling of Creep Deformation Mechanisms in Wood

摘要

The study explores the explanatory clarification and quantitative modelling ofthe creep deformation mechanisms in wood, especially creep induced by moisture content changes, i.e. the mechano-sorptive phenomenon. The experimental section contains the documentation of two bending creep experiments of small size specimens in cyclic humidity conditions under varying load. The theoretical section contains the development of a new creep model (constitutive equation) for the longitudinal, parallel to grain direction. It is shown that the mechano-sorptive phenomenon can be accounted for as a coupling effect during moisture content changes because of the non-linear character of the creep process.