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林业科学 ›› 2002, Vol. 38 ›› Issue (4): 134-140.doi: 10.11707/j.1001-7488.20020422

• 论文及研究报告 • 上一篇    下一篇

刨花板厚度方向变形研究 Ⅲ.刨花板厚度方向变形模型及规律的确定

顾继友 高振华 王逢瑚 李治国 程瑞香   

  1. 东北林业大学材料科学与工程学院,哈尔滨150040
  • 收稿日期:2000-01-11 修回日期:1900-01-01 出版日期:2002-07-25 发布日期:2002-07-25

STUDIES OF THICKNESS SWELLING ON WOOD COMPOSITE Ⅲ. ESTABLISHMENT OF EQUATIONS FOR DEFORMATION IN THE THICKNESS OF PARTICLEBOARD

Gu Jiyou,Gao Zhenhua,Wang Fenghu,Li Zhiguo,Cheng Ruixiang   

  1. Material Science and Engineering College,Northeast Forestry University Harbin150040
  • Received:2000-01-11 Revised:1900-01-01 Online:2002-07-25 Published:2002-07-25

摘要:

对不同密度杨木刨花板、落叶松刨花板及不同厚度杨木、落叶松在不同方向的吸水厚度膨胀率进行追踪测试,然后进行回归拟合,结果表明,刨花板和木材的吸水厚度膨胀率方程与理论推导结果能很好的吻合,方程的数学形式都为:TS(t)=a - be-t/τ。由此得到刨花板的粘弹变形方程和胶接点破坏引起的变形方程的数学形式也与上式相同,对于机械吸附蠕变方程通过数学级数变换,也可得到相同的近似式。研究还表明用刨花板的吸水厚度膨胀率方程描述刨花板的尺寸稳定性,可得到该刨花板的最大吸水厚度膨胀率和衡量关于刨花板厚度膨胀速率的参数等信息,因此它更合理和实用。

关键词: 刨花板, 厚度方向变形, 厚度膨胀率方程, 吸水厚度膨胀率

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