南京林业大学学报(自然科学版) ›› 2007, Vol. 31 ›› Issue (01): 131-134.doi: 10.3969/j.jssn.1000-2006.2007.01.031

• 研究简报 • 上一篇    下一篇

木质材料中动弹模量色散关系的分析

余观夏,阮锡根   

  1. 南京林业大学信息科学技术学院, 江苏 南京 210037
  • 出版日期:2007-02-18 发布日期:2007-02-18

Analyses of Dispersion Relations of Dynamic Elastic Modulus in the Wood Materials

YU Guan-xia, RUAN Xi-gen   

  1. College of Information Science and Technology Nanjing Forestry University, Nanjing 210037, China
  • Online:2007-02-18 Published:2007-02-18

摘要: <正>根据胶合板结构特点及速生杨木单板的面内弹性常数预测模型。,将复合材料经典层合板理论的刚度模型应用于胶合板类人造板。模型验证实验中,在表、背单板上正交铺设浸渍纸,使用电阻应变片可测得试件在受轴向拉伸或纯弯曲载荷时上、下表面的应变εx和εy,对部分柔度系数的实验值和模型理论值进行了验证。结果表明:刚度模型能较好地预测胶合板的刚度值,经典层合板理论刚度模型可以用于描述胶合板的刚度问题。

Abstract: This paper deals with the method of stress wave to measure the elastic modulus, loss modulus and their dispersion relationships against frequency of materials. By means of modulus measurements of two kinds of timber, when the frequency of vibration is higher than the base frequency, the elastic modulus is increased with frequencies; but the loss modulus decreases with frequencies.

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