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|Table of Contents|

足尺人造板动态黏弹性检测(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2015年06期
Page:
131-136
Column:
研究论文
publishdate:
2015-11-30

Article Info:/Info

Title:
Detection on dynamic viscoelasticity of full-size wood composite panels
Article ID:
1000-2006(2015)06-0131-06
Author(s):
GUAN Cheng1 ZHANG Houjiang1* ZHOU Lujing1 LIN Wei2
1.School of Technology, Beijing Forestry University, Beijing 100083, China;
2. Krono(Beijing) Wood Panels Co., Ltd., Beijing 100068, China
Keywords:
full-size wood composite panel “free-free” supporting free vibration dynamic viscoelasticity storage modulus loss modulus
Classification number :
TS653.5; S781
DOI:
10.3969/j.issn.1000-2006.2015.06.023
Document Code:
A
Abstract:
The dynamic viscoelasticity of full-size composite panels is an important inductor to characterize mechanical properties. At present, domestic and international detection methods and equipment are not capable of mearsuring full-size wood composite panels' dynamic viscoelasticity. In order to detect the dynamic viscoelasticity of full-size wood composite panels quickly, this paper presents a test method based on “free-free” supporting free vibration principle. The first order natural frequency of full-size wood composite panels supported in “free-free” condition, log of the coefficient of attenuation of vibration wave and the quality of wood composite panels were measured to detect the dynamic viscoelasticity of full-size composite panels. The dynamic viscoelasticity of 120 pieces of particleboard and plywood panels were tested using a laboratory testing apparatus for measuring mechanical performance of full-size wood composite panels. Following free vibration testing, one small specimens were cut from each panel and cantilever vibration test was then performed on each specimen to obtain dynamic viscoelasticity. Then, comparing the test results of two kinds of methods, the results indicate that there is a very significant linear correlation between them, and the correlation coefficient of storage modulus and loss modulus of correlation coefficient is 0.944 and 0.956, respectively. It also proves that the detection method of the dynamic viscoelasticity of full-size wood composite panels based on “free-free” supporting free vibration principle vibration is feasible.

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Last Update: 2015-11-30