足尺人造板动态黏弹性检测

管成; 张厚江; 周卢婧; 林蔚

doi:10.3969/j.issn.1000-2006.2015.06.023

足尺人造板动态黏弹性检测

管成,张厚江,周卢婧,林蔚

南京林业大学学报（自然科学版） ›› 2015, Vol. 39 ›› Issue (06) : 131-136.

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南京林业大学学报（自然科学版） ›› 2015, Vol. 39 ›› Issue (06) : 131-136. DOI: 10.3969/j.issn.1000-2006.2015.06.023

研究论文

足尺人造板动态黏弹性检测

管成¹,张厚江^1*,周卢婧¹,林蔚²

作者信息 +

Detection on dynamic viscoelasticity of full-size wood composite panels

GUAN Cheng¹, ZHANG Houjiang^1*, ZHOU Lujing¹, LIN Wei²

Author information +

文章历史 +

摘要

为了快速检测足尺人造板整板的动态黏弹性,提出了一种基于“自由-自由”支承自由振动原理的检测方法,即通过测量在两节线处线支承下足尺人造板自由振动时的第一阶固有频率、衰减振动波形的对数减幅系数和人造板的质量来检测足尺人造板整板的动态黏弹性。利用自行研制的足尺人造板力学性能检测试验装置,检测了120张足尺刨花板和胶合板的动态黏弹性,并将检测结果与基于悬臂振动原理的小试件动态黏弹性检测法测量结果进行了对比。结果表明:两者间有显著的线性相关关系,储能模量和损耗模量的相关系数分别达到0.944和0.956。因此,基于“自由-自由”支承自由振动法来检测足尺人造板的动态黏弹性是可行的。

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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管成,张厚江,周卢婧,林蔚. 足尺人造板动态黏弹性检测[J]. 南京林业大学学报（自然科学版）. 2015, 39(06): 131-136 https://doi.org/10.3969/j.issn.1000-2006.2015.06.023

GUAN Cheng, ZHANG Houjiang, ZHOU Lujing, LIN Wei. Detection on dynamic viscoelasticity of full-size wood composite panels[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2015, 39(06): 131-136 https://doi.org/10.3969/j.issn.1000-2006.2015.06.023

中图分类号： TS653.5 S781

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基金

收稿日期:2015-03-04 修回日期:2015-05-21
基金项目:国家林业公益性行业科研专项项目(201304512)
第一作者:管成,硕士。*通信作者:张厚江,教授。E-mail: hjzhang6@bjfu.edu.cn。
引文格式:管成,张厚江,周卢婧,等. 足尺人造板动态黏弹性检测[J]. 南京林业大学学报:自然科学版,2015,39(6):131-136.