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Journal of Wood Science

Official Journal of the Japan Wood Research Society

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Effects of density profile of MDF on stiffness and strength of nailed joints

Journal of Wood Science volume 54, pages 45–53 (2008)Cite this article

Abstract

Nail-head pull-through, lateral nail resistance, and single shear nailed joint tests were conducted on medium density fiberboard (MDF) with different density profiles, and the relations between the results of these tests and the density profiles of MDF were investigated. The maximum load of nail-head pull-through and the maximum load of nailed joints were little affected by the density profile. However, the ultimate strength of lateral nail resistance, the stiffness, and the yield strength of nailed joints were affected by the density profile of MDF and showed high values when the surface layer of the MDF had high density. It is known that bending performance is also influenced by density profile. Therefore, the stiffness and the yield strength of nailed joints were compared with the bending performance of MDF. The stiffness of nailed joints was positively correlated with the modulus of elasticity (MOE); in the case of CN65 nails, the initial stiffness of joints changed little in response to changes in MOE. The yield strength of nailed joints had a high positive correlation with the modulus of rupture (MOR). The stiffness and the yield strength of nailed joints showed linear relationships with MOE and MOR, respectively.

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Authors and Affiliations

  1. Graduate School of Agriculture, Hokkaido University, N9 W9, Kita-ku, Sapporo, 060-8589, Japan

    Kei Sawata

  2. Composite Products Laboratory, Department of Wood-Based Materials, Forestry and Forest Products Research Institute, Tsukuba, 305-8687, Japan

    Tatsuya Shibusawa & Yasunori Hatano

  3. Iwate Prefectural Forestry Technology Center, Iwate, 028-3623, Japan

    Kazuo Ohashi

  4. Faculty of Engineering in Wood Technology, University Michoacana of San Nicolas de Hidalgo, C.P. 58228 Morelia, Michoacan, Mexico

    Javier Ramon Sotomayor Castellanos

Authors
  1. Kei Sawata
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  2. Tatsuya Shibusawa
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  3. Kazuo Ohashi
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  4. Javier Ramon Sotomayor Castellanos
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  5. Yasunori Hatano
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Correspondence to Kei Sawata.

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Sawata, K., Shibusawa, T., Ohashi, K. et al. Effects of density profile of MDF on stiffness and strength of nailed joints. J Wood Sci 54, 45–53 (2008). https://doi.org/10.1007/s10086-007-0909-5

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  • DOI: https://doi.org/10.1007/s10086-007-0909-5

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