journal of materials research and technology 2021;14:1630 e 1643
Available online at www.sciencedirect.com
journal homepage: www.elsevier.com/locate/jmrt
Original Article
Numerical modeling for adjustment of the equivalent moduli of elasticity of OSB layers estimated from experimental flexural rigidity Julio Soriano a, * , Juliano Fiorelli b , Wanley E. Lopes Junior b , Guilherme H.A. Barbirato b , Leonardo R. Deldotti a a Department of Rural Constructions and Ambience, School of Agricultural Engineering, University of Campinas, Avenue Candido Rondon 501, Campinas, SP, 13083-875, Brazil b Department of Biosystems Engineering, Faculty of Animal Science and Food Engineering, University of S ~ ao Paulo, Avenue Duque de Caxias Norte 225, Pirassununga, SP, 13630-000, Brazil
article info
a b s t r a c t
Oriented strand board (OSB) panels are well-known for their many applications and as a complex multi-layer composite, which elastic properties are commonly obtained by testing the specimens for the longitudinal and transverse directions of the panel. This study aimed to establish a method to obtain the equivalent moduli of elasticity to each panel layer. For this purpose, OSB panels were manufactured from balsa wood waste and castor oil poly- urethane resin. Based on the flexural rigidity for each panel direction and considering the geometric and elastic parameters, a system of the equations was established to obtain the equivalent moduli of elasticity of each layer. The method proposed was validated using the finite element method. The experimental results showed that the elastic-linear behavior was quite accurate for up to approximately 60% of the ultimate stress, and thereafter the non-linearity was better fitted by a multi-linear model. The load-deflection curves, both for the longitudinal and transverse directions, for the elastic phase were precisely represented with the equivalent moduli of elasticity. For non-linear segments, there was a strong dependence on the parameters adopted in the model. The results obtained in this study showed that the equivalent moduli of elasticity of layers of OSB panel can be obtained based on the results of bending test of specimens manufactured with the full thickness of the panel, providing properties for more detailed applications in the modeling with of this layered wood-based product. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Article history: Received 14 March 2021 Accepted 9 July 2021 Available online 20 July 2021 Keywords: Wood-based composites Finite element method Multi-layer element Deflections Bending stress
* Corresponding author. E-mail address: julio.soriano@feagri.unicamp.br (J. Soriano).
https://doi.org/10.1016/j.jmrt.2021.07.048 2238-7854/Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).
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