Table 5 Mechanical and physical initial properties

Wood young moduli

E_L = 10,060 MPa

E_R = 641 MPa

E_T = 306 MPa

Wood shear moduli

G_RT = 200 MPa

G_TL = 640 MPa

G_LR = 860 MPa

Wood Poisson’s ratios

\(\nu\) _RT = 0.7

\(\nu\) _LT = 0.47

\(\nu\) _LR = 0.46

Wood shrinkage

α_L = 0.39%/%

α_R = 1.92%/%

α_T = 3.45%/%

Coefficient of moisture diffusion in wood

D₀₌1.52⋅10^–4 mm²s⁻¹

Front emissivity

E_c = 1.0⋅10^–5 mm⋅s⁻¹

Back emissivity

E_c1 = 1.0⋅10^–5 mm⋅s⁻¹

Paint layers young modulus

E_p = 1000 MPa

Paint layers Poisson ‘s ratio

\({\nu }_{p}=\)0.2—not subjected to optimization

X

1

Y

1