Official Journal of the Japan Wood Research Society
Table 1 Material parameters used
From: Analysis of drying stresses in green-glued plywood of Bete (Mansonia Altissima) specie
N° | Designation | Parameters along orthotropic directions | Observations | |||
|---|---|---|---|---|---|---|
1 | Elastic properties (12%) | EL (MPa) GLT (MPa) νLT = 0.46 | ET (MPa) GTR (MPa) νTR = 0.39 | ER = 1846 MPa GLR (MPa) νLR = 0.39 | EL and ET were determined experimentally. The other elastic properties were obtained from the literature [16, 22] | |
2 | Failure strengths | \({\sigma}_{\text{RL}}\) (MPa) | \({\sigma}_{\text{RT}}\) (MPa) | σRL and σRT were obtained experimentally | ||
3 | Total shrinkage coefficient | αL = 0.001 | αT (%) | αR (%) | αT and αR were determined experimentally. αL was given by the literature | |
4 | Density of wood (Bete) (12%) | This value was determined experimentally | ||||
5 | Compliances of mechano-sorptive creep (MPa−1) | \({m}_{L}\text{=0.1 }{10}^{-3}\) \({m}_{\text{LT}}=0.008\) \({\mu}_{\text{LT}}= \text{0}\) | \({m}_{T}\text{=0.15}\) \({m}_{\text{RT}}\text{=0.8}\) \({\mu}_{\text{RT}}= \text{1 }\) | \({m}_{R}\text{=0.2}\) \({m}_{\text{LR}}\text{=0.008 }{10}^{-3}\) \({\mu}_{\text{LR}}= \text{0}\) | Obtained in the literature [13, 23] mi = compliance in the direction i mij = compliance in the plan ij with \(i, j \epsilon \left\{\mathrm{L},\mathrm{T},\mathrm{ R}\right\}\): direction of wood | |
\(\bar m = {\rm{ }}\left[ {\begin{array}{*{20}{l}} {\begin{array}{*{20}{c}} {{m_L}}&{ - {\mu _{\rm LT}}{m_L}}&{ - {\mu _{\rm LR}}{m_L}}\\ { - {\mu _{\rm TL}}{m_T}}&{{m_T}}&{ - {\mu _{\rm TR}}{m_T}}\\ { - {\mu _{\rm RL}}{m_R}}&{ - {\mu _{\rm RT}}{m_r}}&{{m_R}} \end{array}}&{\begin{array}{*{20}{c}} 0&0&0\\ 0&0&0\\ 0&0&0 \end{array}}\\ {\begin{array}{*{20}{c}} 0&0&0\\ 0&0&0\\ 0&0&0 \end{array}}&{\begin{array}{*{20}{c}} {{m_{\rm TR}}}&0&0\\ 0&{{m_{\rm LR}}}&0\\ 0&0&{{m_{\rm LT}}} \end{array}} \end{array}} \right]{\rm{ }}\) | ||||||
6 | Diffusion (KD) and exchange coefficients (KC) | \({{K}}_{D}\) (m2/s) KC (m/s) | These parameters were determined experimentally | |||
7 | Viscosity parameters | \({\gamma }_{1}^{l}\) \({\gamma }_{2}^{l}\) \({\gamma }_{3}^{l}\) \({\left({\alpha }_{1}^{l}\right)}^{-1}\) (hours) \({\left({\alpha }_{2}^{l}\right)}^{-1}\) (hours) \({\left({\alpha }_{3}^{l}\right)}^{-1}\) (hours) | \({\gamma }_{\mu }^{l}={\gamma }_{\mu }^{t}={\gamma }_{\mu }^{r}\) \({\alpha }_{\mu }^{l}= {\alpha }_{\mu }^{t}= {\alpha }_{\mu }^{r}\) | \(with {\gamma }_{\mu }^{i}=\frac{{E}_{0}^{i}}{{E}_{\mu }^{i}} and\) \({\alpha }_{\mu }^{i}=\frac{{E}_{\mu }^{i}}{{}} ( {s}^{-1})\) | These parameters were obtained by fitting the models and numerical curves to that resulting from the experiment | |
With \(\epsilon \left\{\mathrm{1,2}, 3\right\}\): number of branches and \(i \epsilon \left\{L,T, R\right\}\): direction of wood | ||||||