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New splitting method for wood fracture characterization

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Summary

A testing procedure with a new and simple specimen shape is presented which is appropriate to characterize fracturing of inhomogeneous and complex materials like wood. With this, the fracture energy of spruce wood is determined in the TL and RL direction. The “size effect”, i.e. influences of specimen dimensions on KIC and Gf (specific fracture energy) are investigated. Stress and deformation distribution in the newly developed specimens are analysed with FE methods. The measured load-displacement curves are approximated by bilinear softening diagrams and FE analysis. Based on these results, it is tried to interpret typical deviations from LEFM's behaviour by mechanisms like microcracking, crack branching or crack tip bridging.

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Authors and Affiliations

  1. Institute of Meteorology and Physics, University of Agriculture, Türkenschanzstraße 18, A 1180, Wien, Austria

    Stefanie E. Stanzl-Tschegg & Dong-Ming Tan

  2. Institute of Technical and Applied Physics, Technical University, Karlsplatz 13, A 1040, Wien, Austria

    Elmar Karl Tschegg

Authors
  1. Stefanie E. Stanzl-Tschegg
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  2. Dong-Ming Tan
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  3. Elmar Karl Tschegg
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Additional information

The authors thank Dr. A. Teischinger for supplying the testing material and Dipl. Ing M. Elser for preparation of the diagrams. Financial support of the Fonds zur Förderung der wissenschaftlichen Forschung, Wien is gratefully acknowledged.

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Stanzl-Tschegg, S.E., Tan, DM. & Tschegg, E.K. New splitting method for wood fracture characterization. Wood Sci.Technol. 29, 31–50 (1995). https://doi.org/10.1007/BF00196930

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  • DOI: https://doi.org/10.1007/BF00196930

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