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Journal of Wood Science

Official Journal of the Japan Wood Research Society

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Dynamic modulus of elasticity and bending properties of large beams of Taiwan-grown Japanese cedar from different plantation spacing sites

Journal of Wood Science volume 44, pages 62–68 (1998)Cite this article

Abstract

The effect of plantation spacings (types A-E) on the bending strength and dynamic modulus of elasticity of 41-year-old Taiwan-grown cedar (Cryptomeria japonica D. Don) was investigated. The results indicate that the highest values for the static bending modulus of elasticity (MOE), modulus of rupture (MOR), and dynamic modulus of elasticity (EDℓ, E Dt) occurred in trees obtained from those most densely planted (type A); there was a significant difference between type A and the other four spacing types (B, C, D, and E), but there were no significant differences among those four types. Interrelations among MOE, MOR, E Dℓ, and E Dt could be represented by positive linear regression formulas, which revealed highly significant differences. The relations among the square value of stress-wave transmission velocity (Vt 2 and Vt 2) and MOE, MOR, E Dl, and E Dt, respectively, could be represented by positive linear regression formulas. The differences were highly significant.

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Authors and Affiliations

  1. Department of Forestry, College of Agriculture, National Taiwan University, No. 1 Sec. 4 Roosevelt Road, Taipei, Taiwan, ROC

    Song-Yung Wang & Chih-Yu Ko

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  1. Song-Yung Wang
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  2. Chih-Yu Ko
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Part of this report was presented at the International Wood Engineering Conference '96, New Orleans, LA, USA, October 1996

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Wang, SY., Ko, CY. Dynamic modulus of elasticity and bending properties of large beams of Taiwan-grown Japanese cedar from different plantation spacing sites. J Wood Sci 44, 62–68 (1998). https://doi.org/10.1007/BF00521876

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  • DOI: https://doi.org/10.1007/BF00521876

Key words

  • Japanese cedar
  • Plantation spacing
  • Stress wave
  • Bending strength
  • Dynamic modulus of elasticity