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Characterisation of the bending stiffness components of MDF panels from full-field slope measurements

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This paper deals with the characterisation of bending stiffness components of medium density fibreboard (MDF) by carrying out a single plate bending test. The approach couples full-field slope measurements with an inverse identification method. MDF panels manufactured with different fractions of Eucalyptus fibres and sugarcane bagasse particles were used. The slope maps generated across the plate surface were measured by the deflectometry technique. The curvature fields of the deformed plate were reconstructed by numerical differentiation afterwards. The virtual fields method was then implemented for material parameter identification under the framework of Kirchhoff–Love plate bending theory. The elastic properties obtained from the proposed data reduction (i.e. simultaneous identification of modulus of elasticity, Poisson’s ratio and shear modulus) were compared with values determined from classical three-point bending tests and reported in the literature. The set of properties were found in relatively good agreement.

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The authors would like to acknowledge the São Paulo Research Foundation (FAPESP), the programs CAPES-GRICES and Ciência 2008 of the Foundation of Science and Technology of Portugal (FCT) for financial support. We also thank São Manoel Sugar Factory S.A. (Brasil) for support in the MDF manufacturing process. Finally, we thank Joaquim Moura and Cristóvão Santos for helping in the plate bending fixture set-up.

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Correspondence to J. Xavier.

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Xavier, J., Belini, U., Pierron, F. et al. Characterisation of the bending stiffness components of MDF panels from full-field slope measurements. Wood Sci Technol 47, 423–441 (2013).

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