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Wood Science and Technology

, Volume 44, Issue 2, pp 205–223 | Cite as

Development of high-performance strand boards: multiscale modeling of anisotropic elasticity

  • Reinhard StürzenbecherEmail author
  • Karin Hofstetter
  • Gerhard Schickhofer
  • Josef Eberhardsteiner
Original

Abstract

The interrelationships between microstructural characteristics and anisotropic elastic properties of strand-based engineered wood products are highly relevant in order to produce custom-designed strand products with tailored properties. A model providing a link between these characteristics and the resulting elastic behavior of the strand products is a very valuable tool to study these relationships. Here, the development, the experimental validation, and several applications of a multiscale model for strand products are presented. In a first homogenization step, the elastic properties of homogeneous strand boards are estimated by means of continuum micromechanics from strand shape, strand orientation, elastic properties of the used raw material, and mean board density. In a second homogenization step, the effective stiffness of multi-layer strand boards is determined by means of lamination theory, where the vertical density profile and different layer assemblies are taken into account. On the whole, this model enables to predict the macroscopic mechanical performance of strand-based panels from microscopic mechanical and morphological characteristics and, thus, constitutes a valuable tool for product development and optimization.

Keywords

Slenderness Ratio Layer Assembly Board Density Homogenization Step Strand Orientation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

Funding by the Federal Ministry of Economics and Labor of the Republic of Austria (BMWA), by the Styrian Business Promotion Agency (SFG), by the federal State of Styria and by the municipality of Graz is gratefully acknowledged.

References

  1. Barnes D (2000) An integrated model of the effect of processing parameters on the strength properties of oriented strand wood products. For Prod J 50(11/12):33–42Google Scholar
  2. Barnes D (2002) A model of the effect of orienter design and operating variables on the mean angular deviation of oriented wood strands. For Prod J 52(7/8):63–71Google Scholar
  3. Benabou L, Duchanois G (2007) Modelling of the hygroelastic behaviour of a wood-based composite for construction. Compos Sci Tech 67:45–53CrossRefGoogle Scholar
  4. Carll CG, Link CL (1988) Tensile and compressive MOE of flakeboards. For Prod J 38(1):8–14Google Scholar
  5. Chen S, Fang L, Liu X, Wellwood R (2008) Effect of mat structure on modulus of elasticity of oriented strandboard. Wood Sci Technol 42(3):197–210CrossRefGoogle Scholar
  6. Eshelby JD (1957) The determination of the elastic field of an ellipsoidal inclusion and related problems. Proc R Soc Lond Ser A 241:376–396CrossRefGoogle Scholar
  7. Geimer RL (1979) Data basic to the engineering design of reconstituted flakeboard. In: Proceedings of the 13th international particleboard/composite materials symposium. Washington State University, pp 105–125Google Scholar
  8. Geimer RL (1986) Mechanical property ratios—a measure of flake alignment. Res Pap FPL–468. USDA Forest Serv, Forest Prod Lab Madison WI, pp 1–10Google Scholar
  9. Geimer RL, Mahoney RJ, Loehnertz SP, Meyer RW (1985) Influence of processing-induced damage on strength of flakes and flakeboards. Res Pap FPL 463, USDA Forest Serv, Forest Prod Lab Madison WI, pp 1–15Google Scholar
  10. Hankinson RL (1921) Investigation of crushing strength of spruce at varying angles of grain. US Air Service Information Circular 3(259):3–15Google Scholar
  11. Hashin Z (1983) Analysis of composite materials—a survey. J Appl Mech 50:481–505CrossRefGoogle Scholar
  12. Hill R (1963) Elastic properties of reinforced solids: some theoretical principles. J Mech Phys Sol 11:357–372CrossRefGoogle Scholar
  13. Hofstetter K, Hellmich Ch, Eberhardsteiner J (2005) Development and experimental verification of a continuum micromechanics model for wood. Eur J Mech A Solids 24:1030–1053CrossRefGoogle Scholar
  14. Hofstetter K, Hellmich Ch, Eberhardsteiner J (2006) The influence of the microfibril angle of wood stiffness: a continuum micromechanics approach. Comput Assist Mech Eng Sci 13:523–536Google Scholar
  15. Hofstetter K, Hellmich Ch, Eberhardsteiner J (2007) Micromechanical modeling of solid-type and plate-type deformation patterns within softwood materials. A review and an improved approach. Holzforschung 61(4):343–351CrossRefGoogle Scholar
  16. Hunt MO, Suddarth SK (1974) Prediction of elastic constants of particleboard. For Prod J 24(5):52–57Google Scholar
  17. Lau PWC (1981) Numerical approach to predict the modulus of elasticity of oriented waferboard. Wood Sci 14(2):73–85Google Scholar
  18. Laws N (1977) The determination of stress and strain concentrations at an ellipsoidal inclusion in an anisotropic material. J Elast 7:91–97CrossRefGoogle Scholar
  19. Lee JN, Wu Q (2003) Continuum modeling of engineering constants of oriented strandboard. Wood Fiber Sci 35(1):24–40Google Scholar
  20. Moses DM, Prion HGL, Li H, Boehner W (2003) Composite behaviour of laminated strand lumber. Wood Sci Technol 37:59–77CrossRefGoogle Scholar
  21. Mundy JS, Bonfield PW (1998) Predicting the short-term properties of chipboard using composite theory. Wood Sci Technol 32:237–245Google Scholar
  22. Mura T (1987) Micromechanics of defects in solids, 2nd edn. Martinus Hijhoff, DordrechtGoogle Scholar
  23. Nishimura T, Amin J, Ansell MP (2004) Image analysis and bending properties of model OSB panels as a function of strand distribution, shape and size. Wood Sci Technol 38:297–309CrossRefGoogle Scholar
  24. Price EW (1976) Determining tensile properties of sweetgum veneer flakes. For Prod J 26(10):50–53Google Scholar
  25. Rammerstorfer FG (1992) Repititorium Leichtbau. Oldenbourg, Veinna (in German)Google Scholar
  26. Shaler SM, Blankenhorn PR (1990) Composite model prediction of elastic moduli for flakeboard. Wood Fiber Sci 22(3):246–261Google Scholar
  27. Simpson WT (1977) Model for tensile strength of oriented flakeboard. Wood Sci 10(2):68–71Google Scholar
  28. Stürzenbecher R, Hofstetter K, Bogensperger T, Schickhofer G, Eberhardsteiner J (2008) A continuum micromechanics approach to elasticity of strand-based engineered wood products: model development and experimental validation. In: Kompis V (ed) Composites with micro- and nano-structure computational modeling and experiments. Springer, New YorkGoogle Scholar
  29. Stürzenbecher R, Hofstetter K, Bogensperger T, Schickhofer G, Eberhardsteiner J (2009) Development of high-performance strand boards: engineering design and experimental investigations. Wood Sci Technol. doi: 10.1007/s00226-009-0258-1
  30. Suo S, Bowyer JL (1995) Modeling of strength properties of structural particleboard. Wood Sci Technol 27(1):84–94Google Scholar
  31. Triche MH, Hunt MO (1993) Modeling of parallel-aligned wood strand composites. For Prod J 43(11/12):33–44Google Scholar
  32. Wang K, Lam F (1999) Quadratic RSM models of processing parameters for three-layer oriented flakeboards. Wood Fiber Sci 31(2):173–186Google Scholar
  33. Wu Q, Lee JN, Han G (2004) The influence of voids on the engineering constants of oriented strandboard: a finite element model. Wood Fiber Sci 36(1):71–83Google Scholar
  34. Xu W (1999) Influence of vertical density distribution on bending modulus of elasticity of wood composite panels: a theoretical consideration. Wood Fiber Sci 31(3):277–282Google Scholar
  35. Xu W, Suchsland O (1998) Modulus of elasticity of wood composite panels with a uniform density profile: a model. Wood Fiber Sci 30(3):293–300Google Scholar
  36. Yadama V, Wolcott MP, Smith LV (2006) Elastic properties of wood-strand composites with undulating strands. Compos Appl Sci Manuf 37:385–392CrossRefGoogle Scholar
  37. Zaoui A (2002) Continuum micromechanics: survey. J Eng Mech (ASCE) 128(8):808–816CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Reinhard Stürzenbecher
    • 1
    • 2
    Email author
  • Karin Hofstetter
    • 1
  • Gerhard Schickhofer
    • 2
    • 3
  • Josef Eberhardsteiner
    • 1
  1. 1.Institute for Mechanics of Materials and StructuresVienna University of TechnologyViennaAustria
  2. 2.holz.bau.forschungs GmbHGrazAustria
  3. 3.Institute for Timber Engineering and Wood TechnologyGraz University of TechnologyGrazAustria

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