Orthotropic hygro-mechanical behavior of Chinese fir during cyclical relative humidity variation

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 1 Changes in local maximum or minimum value of free swelling–shrinkage (ε^α) during the cyclical relative humidity variation

Local maximum or minimum value of ε^α	Occurred sequency	Lagged time (min)
Local maximum or minimum value of ε^α	Occurred sequency	L	R	T
\( \varepsilon^{\alpha }_{ \text{max} } \)	1	3.80	2.62	2.22
	2	3.53	2.42	2.02
	3	3.01	2.12	1.92
	4	2.72	2.02	1.87
	5	2.69	1.92	1.85
	6	2.60	1.94	1.82
\( \varepsilon^{\alpha }_{ \text{min} } \)	1	4.11	3.02	2.51
	2	3.62	2.79	2.33
	3	3.06	2.42	2.21
	4	3.02	2.29	2.12
	5	3.03	2.14	2.03
	6	2.98	2.11	2.05

\( {\text{Lagged time}} = t_{{\varepsilon_{\text{max min}}^{\alpha } }} - t_{{{\text{RH}}_{\text{max min}} }} \); the RH_{max min} are considered as the RH after 60-min isohume conditioning, as marked in Fig. 2