南京林业大学学报（自然科学版）2017，Vol.41Issue(4)：153-159,7.DOI:10.3969/j.issn.1000-2006.201609020
无损检测足尺人造板弹性模量和面内剪切模量
Non-destructive determination of modulus of elasticity and in-plane shear modulus of full-size wood composite panels
摘要
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 naturalfrequencies 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 neasured,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.关键词
足尺人造板/弹性模量/面内剪切模量/横向自由振动/四节点支承/无损检测Key words
full-size wood composite panel/modulu of elasticity (MOE)/in-plane shear modulu/transverse free vibration/four nodes supporting/non-destructive determination分类
轻工纺织引用本文复制引用
管成,张厚江,苗虎,周卢婧..无损检测足尺人造板弹性模量和面内剪切模量[J].南京林业大学学报（自然科学版）,2017,41(4):153-159,7.基金项目
国家林业公益性行业科研专项项目(201304512) （201304512）
