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Size effect of glulam beams in tension perpendicular to grain

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Abstract

The strength of wood is reduced when the stressed volume is increased. The phenomenon is termed size effect and is often explained as being stochastic in the sense that the probability of weak locations occurring in the wood increases with increased volume. This paper presents the hypothesis that the lower strength is caused by stress concentrations. The stress concentrations arise from the anisotropic structure of wood, and are therefore deterministic. The hypothesis is substantiated through extensive FEM-calculations and experiments. A reasonable agreement between ultimate stresses determined experimentally and in FEM-computations was found.

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Acknowledgments

This project was partly sponsored by the Danish Research Agency, “DSF project 2020-00-0017”. We gratefully acknowledge this contribution.

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Authors and Affiliations

  1. Department of Civil Engineering, Technical University of Denmark, Brovej, Building 118, KGS. Lyngby, 2800, Denmark

    T. Astrup, C. O. Clorius & P. Hoffmeyer

  2. Esbjerg Institute of Technology, Aalborg University, Esbjerg, Denmark

    L. Damkilde

Authors
  1. T. Astrup
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  2. C. O. Clorius
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  3. L. Damkilde
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  4. P. Hoffmeyer
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Correspondence to T. Astrup.

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Astrup, T., Clorius, C.O., Damkilde, L. et al. Size effect of glulam beams in tension perpendicular to grain. Wood Sci Technol 41, 361–372 (2007). https://doi.org/10.1007/s00226-006-0113-6

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  • DOI: https://doi.org/10.1007/s00226-006-0113-6

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