Abstract:

By tracking test on the different density particleboard made of Populus ussuriensis and Larix gmelini,and the different thickness wood of Populus ussuriensis and Larix gmelini, this paper showed the thickness swelling equation of particleboard and wood are quite the same and coincide rather well with the theoretical deduction, that is TS(t)=a - be^-t/τ.It can be concluded that the equation of visco-elastic deformation and that of deformation from bonding breaking are the same mathematically. The equation of mechano-sorption creep will have uniform approximate expression by progression transforming. The paper also proved that describing dimensional stability of particleboard with thickness swelling equation would be more reasonable and practical, for it give the information such as the maximal TS and the velocity of thickness swelling.

Key words: Particleboard, Deformation in thickness, Thickness swelling equation, TS