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林业科学 ›› 2011, Vol. 47 ›› Issue (9): 135-139.doi: 10.11707/j.1001-7488.20110923

• 论文 • 上一篇    下一篇

杨木径向压缩的黏弹性行为

张晓敏1,2, 孙正军1, 王喜明2, 尚莉莉2   

  1. 1. 国际竹藤网络中心 北京 100102;2. 内蒙古农业大学材料科学与艺术设计学院 呼和浩特 010019
  • 收稿日期:2009-11-02 修回日期:2010-01-22 出版日期:2011-09-25 发布日期:2011-09-25
  • 通讯作者: 孙正军

Viscoelastic Behavior of Poplar under Radical Compression

Zhang Xiaomin1,2, Sun Zhengjun1, Wang Ximing2, Shang Lili2   

  1. 1. International Center for Bamboo and Rattan Beijing 100102;2. College of Material Science and Art Design, Inner Mongolia Agricultural University Huhhot 010019
  • Received:2009-11-02 Revised:2010-01-22 Online:2011-09-25 Published:2011-09-25

摘要:

以不同厚度杨木单板为原料,探讨不同应变水平、不同温度、不同含水率及有无胶黏剂对杨木单板应力松弛行为的影响。结果表明: 室温、变形相同时,含水率越大,应力松弛量越大; 绝干材随着温度升高,应力松弛量略有增加,但没有含水率的影响显著; 绝干材在变形相同时,有胶比无胶的应力松弛量大。杨木单板的应力松弛行为可以用由Maxwell模型和弹簧并联组成的三元件模型来模拟。

关键词: 杨木单板, 应力松弛, 微观结构, 三元件模型, 黏弹性

Abstract:

A study on the different thickness of poplar ( Populus nigra ) veneer. The effects of the different strain levels,temperature,moisture content(MC) and the adhesive on stress relaxation of poplar veneer were explored. The results showed that: (25±2)℃, under the same deformation, the amount of stress relaxation in proportional to moisture content, 0% moisture content, as the temperature increases, the amount of stress relaxation increase slightly; 0% moisture content,under the same deformation, poplar veneer with adhesive have a greater amount of stress relaxation. And the stress relaxation of poplar veneer behavior can be used by the Maxwell model and spring model composed of three-element to simulate.

Key words: poplar veneer, stress relaxation, microstructure, three-element model, viscoelastic

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