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Modelling the elastic properties of softwood

Part II: The cellular microstructure

Simulieren der elastischen Eigenschaften von Nadelholz

Teil 11: Die zelluläre Feinstruktur

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Abstract

Numerical Finite Element models are presented which relate the macroscopic elastic properties of softwood to local cell characteristics such as cell size, wall thickness, moisture content and microfibril angle. Preliminary results show good agreement with reported values. The model is used to assess the effects of S2 microfibril angle and spiral grain on orthotropic wood stiffness, and to predict the stiffening effect of latewood bands.

Zusammenfassung

Der Beitrag präsentiert numerische FE-Modelle, welche die makroskopischen elastischen Eigenschaften von Nadelholz auf lokale Zellmerkmale wie Größe, Wanddicke, Feuchte und Winkel der Mikronbrillen zurückführen. Erste Ergebnisse zeigen gute Übereinstimmung mit Literturwerten. Mit Hilfe des Modells wird der Einfluß des Winkels der Mikronbrillen in der S2 und der Faserorientierung auf die Biegesteifigkeit des Holzes abgeschätzt sowie ein Versteifungseffekt der Spätholzzonen vorhergesagt.

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Authors and Affiliations

  1. Department of Mechanical Engineering, University of Canterbury, Private Bag 4800, Christchurch, New Zealand

    R. J. Astley, K. A. Stol & J. J. Harrington

Authors
  1. R. J. Astley
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  2. K. A. Stol
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  3. J. J. Harrington
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Additional information

The research reported in this article is funded by the New Zealand Forest Research Institute and by the Public Good Science Fund of New Zealand through Research Gant UOC401.

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Astley, R.J., Stol, K.A. & Harrington, J.J. Modelling the elastic properties of softwood. Holz als Roh-und Werkstoff 56, 43–50 (1998). https://doi.org/10.1007/s001070050262

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