Experimental and Theoretical Modal Analysis of Full-Sized Wood Composite Panels Supported on Four Nodes
Open Access
- 21 June 2017
- Vol. 10 (6), 683
- https://doi.org/10.3390/ma10060683
Abstract
Key elastic properties of full-sized wood composite panels (WCPs) must be accurately determined not only for safety, but also serviceability demands. In this study, the modal parameters of full-sized WCPs supported on four nodes were analyzed for determining the modulus of elasticity (E) in both major and minor axes, as well as the in-plane shear modulus of panels by using a vibration testing method. The experimental modal analysis was conducted on three full-sized medium-density fiberboard (MDF) and three full-sized particleboard (PB) panels of three different thicknesses (12, 15, and 18 mm). The natural frequencies and mode shapes of the first nine modes of vibration were determined. Results from experimental modal testing were compared with the results of a theoretical modal analysis. A sensitivity analysis was performed to identify the sensitive modes for calculating E (major axis: Ex and minor axis: Ey) and the in-plane shear modulus (Gxy) of the panels. Mode shapes of the MDF and PB panels obtained from modal testing are in a good agreement with those from theoretical modal analyses. A strong linear relationship exists between the measured natural frequencies and the calculated frequencies. The frequencies of modes (2, 0), (0, 2), and (2, 1) under the four-node support condition were determined as the characteristic frequencies for calculation of Ex, Ey, and Gxy of full-sized WCPs. The results of this study indicate that the four-node support can be used in free vibration test to determine the elastic properties of full-sized WCPs.This publication has 19 references indexed in Scilit:
- Dynamic determination of modulus of elasticity of full-size wood composite panels using a vibration methodConstruction and Building Materials, 2015
- Analysis of Cantilever-Beam Bending Stress Relaxation Properties of Thin Wood CompositesBioResources, 2015
- Measurement of the in-plane shear modulus of medium-density fibreboard by torsional and flexural vibration testsMeasurement, 2015
- Evaluation of Dynamic Modulus of Elasticity of Medium Density Fiberboard Panel from Longitudinal Vibration Tests on SpecimensBioResources, 2014
- Cantilever Beam Static and Dynamic Response Comparison with Mid-Point Bending for Thin MDF Composite PanelsBioResources, 2012
- Measurement of dynamic modulus of elasticity and damping ratio of wood-based composites using the cantilever beam vibration techniqueConstruction and Building Materials, 2012
- Edgewise shear modulus of plywood measured by square-plate twist and beam flexure methodsConstruction and Building Materials, 2009
- Cross-Laminated Timber Plates: Evaluation and Verification of Homogenized Elastic PropertiesJournal of Structural Engineering, 2007
- On-line non-destructive evaluation and control of wood-based panels by vibration analysisJournal of Sound and Vibration, 2003
- Using Modal Analysis for Estimation of Anisotropic Material ConstantsJournal of Engineering Mechanics, 1997