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Mechanical behavior of chemically modified Norway spruce: a generic hierarchical model for wood modifications

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Abstract

Modifications alter hygro-mechanical properties of wood in non-trivial ways that depend on modification treatment and wood microstructure. Generic micromechanical models with modifications on the cellular scale of spruce are proposed and studied, such as partial and entire lumen filling with isotropic materials, as well as modification of S2-layer properties. Based on a hierarchical micromechanical model, hygro-mechanical response surfaces of the modified, orthotropic material are predicted. Simulation results are compared to experimental data. The findings can be used for optimizing modification treatments, as well as for calculating the behavior in graded situations, common to treatments with limited modification depth.

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Acknowledgements

This work was funded by the Swiss National Science Foundation in the National Research Programme NRP 66 - Resource Wood under Grant No. 406640-140625: Improved wood materials for structures and interior applications. SOO acknowledges the financial support provided by the Federal Commission for Scholarships for Foreign Students with the award of Swiss Government Excellence Scholarship for doctoral research. In addition, the authors acknowledge M. Fuhr for sharing phase contrast tomographic raw data.

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Authors and Affiliations

  1. Paul Scherrer Institute, 5232, Villigen, Switzerland

    Diego F. Mora Mendez

  2. Institute for Building Materials, ETH Zurich, Stefano-Franscini-Platz 3, 8093, Zurich, Switzerland

    Samuel Oluyinka Olaniran, Markus Rüggeberg, Ingo Burgert, Hans J. Herrmann & Falk K. Wittel

  3. Laboratory of Applied Wood Materials, Empa, 8600, Dübendorf, Switzerland

    Samuel Oluyinka Olaniran, Markus Rüggeberg & Ingo Burgert

  4. Departamento de Física, Universidade do Ceará, Fortaleza, 60451-970, Brazil

    Hans J. Herrmann

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  1. Diego F. Mora Mendez
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  2. Samuel Oluyinka Olaniran
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  3. Markus Rüggeberg
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  4. Ingo Burgert
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  5. Hans J. Herrmann
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  6. Falk K. Wittel
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Correspondence to Falk K. Wittel.

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H. J. Herrmann: on leave from CNRS UMR 7636, PMMH, ESPCI, 10 rue Vauquelin, 75231 Paris Cedex 05, France.

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Mora Mendez, D.F., Olaniran, S.O., Rüggeberg, M. et al. Mechanical behavior of chemically modified Norway spruce: a generic hierarchical model for wood modifications. Wood Sci Technol 53, 447–467 (2019). https://doi.org/10.1007/s00226-019-01082-3

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  • DOI: https://doi.org/10.1007/s00226-019-01082-3

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