我们的网站为什么显示成这样?

可能因为您的浏览器不支持样式,您可以更新您的浏览器到最新版本,以获取对此功能的支持,访问下面的网站,获取关于浏览器的信息:

|Table of Contents|

Non-destructive determination of modulus of elasticity and in-plane shear modulus of full-size wood composite panels(PDF)

Journal of Nanjing Forestry University(Natural Science Edition)[ISSN:1000-2006/CN:32-1161/S]

Issue:
2017 04
Page:
153-159
Column:
lw
publishdate:
2017-07-31

Article Info:/Info

Title:
Non-destructive determination of modulus of elasticity and in-plane shear modulus of full-size wood composite panels
Article ID:
1000-2006(2017)04-0153-07
Author(s):
GUAN Cheng ZHANG Houjiang*MIAO Hu ZHOU Lujing
School of Technology, Beijing Forestry University, Beijing 100083, China
Keywords:
full-size wood composite panel modulu of elasticity(MOE) in-plane shear modulu transverse free vibration four nodes supporting non-destructive determination
Classification number :
TS653.5; S781.2
DOI:
10.3969/j.issn.1000-2006.201609020
Document Code:
A
Abstract:
【Objective】This paper presents a method based on transverse free vibration for the rapid, online non-destructive determination of the modulus of elasticity(MOE)along the length and width directions as well as in-plane shear modulus of full-size wood composite panels(WCPs). Accordingly, the three frequencies for the first-order bending along the length and width directions, as well as the torsion for the full-size WCPs supported on four nodes and their density, were measured.【Method】Five full-size WCP pieces were tested through experimental model analysis, including three different thicknesses of medium density fiberboards(MDF)and two different thicknesses of plywood(PW). The natural frequencies and mode shapes of the first nine modes for full-size WCPs supported on four nodes were obtained. Following modal testing, the mechanical properties for the full-size WCPs were measured, and the repeat ability of the test results was analyzed.【Result】The first and seventh order mode shapes for both MDF and plywood indicated the first order bending along the length and width directions respectively. The fifth order mode for MDF and fourth order mode for plywood indicated torsion. The results of the test showed excellent repeatability.【Conclusion】Determination of the MOE along the length and width directions,as well as the in-plane shear modulus of the full-size WCPs supported on four nodes based on the transverse free vibration, is thus feasible.

References

[1] 周雄志.我国人造板产业发展战略研究[D].北京:北京林业大学,2010. ZHOU X Z. Study on development strategy of wood-based panel industry in China [D].Beijing: Beijing Forestry University, 2010.
[2] 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. DOI:10.3969/j.issn.1000-2006.2015.06.023. GUAN C, ZHANG H J, ZHOU L J, et al. Detection on dynamic viscoelasticity of full-size wood composite panels [J]. Journal of Nanjing Forestry University(Natural Sciences Edition), 2015, 39(6):131-136.
[3] SCHULTE M, FRüHWALD A. Shear modulus, internal bond and density profile of medium density fibreboard(MDF)[J]. Holzals Roh-und Werkstoff, 1995, 54(1):49-55.DOI: 10.1007/s001070050132.
[4] DÜNDAR T, AS N, AKKILIC H. The prediction of mechanical properties of wood-based composites with vibration NDE method [J]. Journal of the Faculty of Forestry Istanbul University, 2008, 58(2): 43-59.
[5] 全国人造板标准化技术委员会.GB/T 17657-2013 人造板及饰面人造板理化性能试验方法[S].北京:中国标准出版社,2013.
[6] COPPENS H. Quality control of particleboards by means of their oscillation behavior [C]//Proceedings of FESYP technical conference. Munich: European Federation of Associations of Particleboard Manufactures, 1988:143-165.
[7] MCNATT J D, WELLWOOD R W, BACH L. Relationships between small-specimens and large panel bending tests on structural wood-based panels[J]. Forest Products Journal, 1990, 40(9): 10-16.
[8] SOBUE N, KATOH A. Simultaneous determination of orthotropic elastic constants of standard full-size plywoods by vibration method [J]. Mokuzai Gakkaishi, 1992, 38(10):895-902.
[9] LARSSON D. Using modal analysis for estimation of anisotropic material constants [J]. Journal of Engineering Mechanics, 1997, 123(3):222-229.DOI: 10.1061/(ASCE)0733-9399(1997)123:3(222).
[10] MIRBOLOUK P, ROOHNIA M. Evaluation of dynamic modulus of elasticity of medium density fiberboard panel from longitudinal vibration tests on specimens [J]. BioResources, 2015, 10(1): 613-621. DOI:10.15376/biores.10.1.613-621.
[11] ZHOU J H, CHUI Y H, GONG M, et al. Simultaneous measurement of elastic constants of full-size engineered wood-based panels by modal testing [J]. Holzforschung, 2016, 70(7): 673-682. DOI:10.1515/hf-2015-0117.
[12] 高燕秋,王兆伍,张齐生.TMJ-A人造板弹性模量无损检测显示机的误差因素分析[J].木材工业,2002, 16(5): 24-26. DOI:10.3969/j.issn.1001-8654.2002.05.007. GAO Y Q, WANG Z W, ZHANG Q S. Analysis of measuring error on TMJ-A nondestructive testing equipment for structural board [J].China Wood Industry, 2002, 16(5):24-26.
[13] 周海宾,任海青,费本华,等.木质复合板弯曲、剪切弹性模量动态测试[J].建筑材料学报,2007,10(5): 561-565. DOI:10.3969/j.issn.1007-9629.2007.05.012. ZHOU H B, REN H Q, FEI B H, et al. Dynamical test on flexural and shear modulus of composite wood panels [J]. Journal of Building Materials, 2007, 10(5):561-565.
[14] GUAN C, ZHANG H J, ZHOU L J, et al. Dynamic determination of modulus of elasticity of full-size wood composite panels using vibration method [J]. Construction & Building Materials, 2015, 100:201-206. DOI:10.1016/j.conbuildmat.2015.10.008.
[15] 屈维德,唐恒龄.机械振动手册[M]. 2版.北京:机械工业出版社,2000.
[16] HEARMON R F S. An introduction to applied anisotropic elasticity [M]. Oxford: Oxford University Press, 1961.
[17] HEARMONR F S. The fundamental frequency of vibration of rectangular wood and plywood plates [J].Proceedings of the Physical Society, 1946, 58(1): 78-92.
[18] 管成,周卢婧,张厚江.足尺中密度纤维板振动模态分析[J]. 西北林学院学报, 2015, 30(3):228-233. DOI:10.3969/j.issn.1001-7461.2015.03.40. GUAN C, ZHOU L J, ZHANG H J. Analysis of the vibration modal of the full-sized medium density fiberboard [J]. Journal of Northwest Forestry University, 2015, 30(3): 228-233.
[19] 江世媛,姚熊亮,黄国权.简化的舱段船壳模型试验模态分析[J].哈尔滨工程大学学报,2003,24(5):483-486. DOI:10.3969/j.issn.1006-7043.2003.05.003. JIANG S Y,YAO X L,HUANG G Q. The experimental modal analysis of model of the simplified hull in the cabin section[J].Journal of Harbin Engineering University, 2003,24(5):483-486.

Last Update: 1900-01-01