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Journal of Wood Science

Official Journal of the Japan Wood Research Society

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Hardness distribution on wood surface

Journal of Wood Science volume 47, pages 1–7 (2001)Cite this article

Abstract

For better understanding wood hardness, we developed a new hand-operated hardness tester that works with Brinell's method. With this tester we investigated the hardness distribution of wood minutely using a 2mm diameter ball tip. The following results were obtained: (1) On preliminary examination with medium-density fiberboard, we found that the value of Brinell's hardness decreased with the increase in the tip ball's diameter but that it was almost constant with the indenting velocity. (2) By using a small diameter tip, the difference of the hardness became clearer between earlywood and latewood. (3) With radial and tangential sections, we obtained hardness distribution patterns similar to those of wood grain. It seems that the hardness distribution reflects the distribution of density on wood surfaces.

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Author information

Authors and Affiliations

  1. Joetsu University of Education, Joetsu, 943-8512, Niigata, Japan

    Seiji Hirata

  2. Graduate School of Agricultural and Life Science, The University of Tokyo, 113-8657, Tokyo, Japan

    Masamitsu Ohta

  3. Nishikawa Junior High School, Nishikawa-cho, Nishikanbara-gun, 959-0422, Niigata, Japan

    Yasuo Honma

Authors
  1. Seiji Hirata
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  2. Masamitsu Ohta
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  3. Yasuo Honma
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Corresponding author

Correspondence to Seiji Hirata.

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Hirata, S., Ohta, M. & Honma, Y. Hardness distribution on wood surface. J Wood Sci 47, 1–7 (2001). https://doi.org/10.1007/BF00776637

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  • DOI: https://doi.org/10.1007/BF00776637

Key words

  • Bnnells hardness
  • Ball diameter
  • Handy-type tester
  • Two-dimensional distribution