Skip to main content

Official Journal of the Japan Wood Research Society

  • Note
  • Published:

Shear modulus of several kinds of Japanese bamboo obtained by flexural vibration test

Abstract

The vibrational properties of Japanese bamboo were examined. To obtain the Young’s modulus and shear modulus, a flexural vibration test and a longitudinal vibration test were conducted. The Young’s modulus with vibration in the R-direction was smaller than that measured in the longitudinal vibration test E l . This was due to the shift of the neutral axis to the outer layer. On the other hand, the Young’s modulus with vibration in the T-direction was close to E l . Hence, an adequate Young’s modulus should be used for each use of bamboo. The shear moduli of the LR and LT planes of bamboo were similar to those of beech. There were high correlations between shear moduli of the LR and LT planes and density.

References

  1. Inokuchi Y (2003) Utilization of bamboo from the point of view of mechanical properties (in Japanese). Wood Ind 58:157–164

    Google Scholar 

  2. Suzuki Y (1948) Studies on bamboo. I. Distribution of physical and mechanical properties in the stem of Phyllostachys pubescens Magel et H. de Lehaie of prov. Izu. On the specific gravity, fiber-content, bending strength, Young’s modulus and shear strength (in Japanese). Bull Tokyo Univ For 36:135–156

    Google Scholar 

  3. Goens E (1931) Über die Bestimmung des Elastizitätsmodulus von Stäben mit Hilfe von Biegungsschwingungen (in German). Annalen der Physik 5:649–678

    Article  Google Scholar 

  4. Hearmon RFS (1958) The influence of shear and rotatory inertia on the free flexural vibration of wooden beams. Br J Appl Phys 9:381–388

    Article  Google Scholar 

  5. Timoshenko SP (1921) On the correction for shear of the differential equation for transverse vibrations of prismatic bars. Phil Mag 41:744–746

    Google Scholar 

  6. Nakao T, Okano T, Asano I (1984) Measurement of the anisotropic-shear modulus by the torsional-vibration method for free-free wooden beams (in Japanese). Mokuzai Gakkaishi 30:877–885

    Google Scholar 

  7. Dong Y, Nakao T, Tanaka C, Takahashi A, Nishino Y (1995) Studies of shear properties of wood-based panels by torsional vibration (in Japanese). Mokuzai Gakkaishi 41:887–894

    Google Scholar 

  8. Dong Y, Nakao T, Tanaka C, Takahashi A, Nishino Y (1996) Anisotropic shear modulus of wood-based composite (in Japanese). J Soc Mater Sci Jpn 45:566–571

    Google Scholar 

  9. Inokuchi Y, Fushitani M, Chuma S, Ozawa M, Kubo T, Sato K (1997) Effects of volume fraction of bundle sheath on the vibrational properties of bamboo (in Japanese). Mokuzai Gakkaishi 43:391–398

    CAS  Google Scholar 

  10. Inokuchi Y, Fushitani M, Kubo T, Sato K (1999) Effects of water extractives on the moisture-content dependence of vibrational properties of bamboo (in Japanese). Mokuzai Gakkaishi 45:77–84

    CAS  Google Scholar 

  11. Cave, ID (1968) The anisotropic elasticity of the plant cell wall. Wood Sci Technol 2:268–278

    Article  Google Scholar 

  12. Norimoto M, Tanaka F, Ohgama T, Ikimune R (1986) Specific Young’s modulus and internal friction of wood in the longitudinal direction (in Japanese). Wood Res Tech Note 22:53–65

    Google Scholar 

  13. Kubojima Y, Okano T, Ohta M (1997) Effect of annual ring widths on structural and vibrational properties of wood. Mokuzai Gakkaishi 43:634–641

    CAS  Google Scholar 

  14. Nomura T, Yamada T (1972) Structural observation on wood and bamboo by X-ray. Wood Res 52:1–12

    Google Scholar 

  15. Nomura T, Yamada T (1974) Crystallinity change in the growing stage of bamboo (Phyllostachys mitis). Wood Res 57:23–30

    Google Scholar 

  16. Nomura T (1980) Growth of bamboo (in Japanese). Wood Res Tech Note 15:6–33

    Google Scholar 

  17. Hearmon RFS (1948) Elasticity of wood and plywood. Forest products research special report 7. His Majesty’s Stationary Office, London, pp 1–87

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Yoshitaka Kubojima.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Kubojima, Y., Inokuchi, Y., Suzuki, Y. et al. Shear modulus of several kinds of Japanese bamboo obtained by flexural vibration test. J Wood Sci 56, 64–70 (2010). https://doi.org/10.1007/s10086-009-1047-z

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10086-009-1047-z

Keywords