DOI QR코드

DOI QR Code

Nondestructive Evaluation of Strength Performance for Heat-Treated Wood Using Impact Hammer & Transducer

  • Won, Kyung-Rok (College of Agriculture & Life Science, Gyeongsang National University) ;
  • Chong, Song-Ho (Forest Training Institute, Korea Forest Service) ;
  • Hong, Nam-Euy (College of Agriculture & Life Science, Gyeongsang National University) ;
  • Kang, Sang-Uk (College of Agriculture & Life Science, Gyeongsang National University) ;
  • Byeon, Hee-Seop (College of Agriculture & Life Science, IALS, Gyeongsang National University)
  • Received : 2013.06.19
  • Accepted : 2013.09.17
  • Published : 2013.09.25

Abstract

Nondestructive evaluation (NDE) technique method using a resonance frequency mode was carried out for heat-treated wood under different conditions. The effect of heat treatment on the bending strength and NDE technique using the resonance frequency by impact hammer and force transducer mode for Korean paulownia, Pinus densiflora, Lidiodendron tulipifera and Betula costata were measured. The heat treatment temperature has been investigated at $175^{\circ}C$ and $200^{\circ}C$, respectively. There were a close relationship of dynamic modulus of elasticity and static bending modulus of elasticity to MOR. In all conditions, It was found that there were a high correlation at 1% level between dynamic modulus of elasticity and MOR, and static modulus of elasticity and MOR. However, the result indicated that correlation coefficient is higher in dynamic modulus of elasticity to MOR than that in static modulus of elasticity to MOR. Therefore, the dynamic modulus of elasticity using resonance frequency by impact hammer mode is more useful as a nondestructive evaluation method for predicting the MOR of heat-treated wood under different temperature and species conditions.

Keywords

References

  1. Bodig, J. and B. A. Jayne. 1982. Mechanics of Wood and Wood Composites. Van Nostrand Reinhold company. New York. pp. 247-269, 645-650.
  2. Bucur, V. 1995. Acoustics of Wood. CRC Press, Boca Ration, Fla. pp. 105-106.
  3. Byeon H.-S. and B.-H. Hong. 1997. The dynamic mechanical properties of Agathis Alba used for piano soundboards. J. of Korean Society of furniture technology 8(1/2): 9-16.
  4. Byeon, H. S., H. M. Park, and F. Lam. 2005. Nondestructive evaluation of strength performance for finger-jointed wood using flexural vibration techniques. Forestry Products Journal 55(10): 37-42.
  5. Byeon, H. S., K. R. Won, T. H. Kim, K. K. Hwang, S. H. Chong, and N. E. Hong. 2012. Effect of heat treatment on the bending strength and hardness of wood. Mokchae Konghak 40(5): 303-310. https://doi.org/10.5658/WOOD.2012.40.5.303
  6. Esteves, B., A. V. Marques, I. Domingos, and H. Pereira. 2007. Influence of steam heating on the properties of pine (Pinus Pinaster) and eucalypt (Eucalypus globulus) wood. Wood Sci Technol 41(3): 193-207. https://doi.org/10.1007/s00226-006-0099-0
  7. Gehards, C. C. 1974. Stress wave speed and MOE of sweetgum ranging from 150 to 15 percent MC. Forest Prod. J. 25(4): 51-57.
  8. Hong B.-H. 1985. The dynamic mechanical properties of Paulownia coreana used for sounding boards. Mokchae Konghak 13(3): 34-40.
  9. Hong B.-H. and H.-S. Byeon. 1995. Dynamic MOE and Internal Friction of Compression Woods in Pinus densiflora. Mokchae Konghak 23: 32-36.
  10. Kocaefe D, S. Poncsak and Y. Boluk. 2008. Effect of thermal treatment on the chemical composition and mechanical properties of birch and aspen. Bioresources 3(2): 517-537.
  11. Kocaefe D, S. Poncsak and J. Tang. 2010. Effect of heat treatment on the mechanical properties of North American jack pine: thermogravimetric study. J Mater Sic. 45: 681-687. https://doi.org/10.1007/s10853-009-3985-7
  12. Nakai, T. 1984. Full size bending strength of sugi timber. Wood industry 39(11): 42-46.
  13. Park H.-M. and H.-S. Byeon. 2006. Measurement of dynamic MOE of 3-ply woods by flexural vibration and comparison with bending strength and creep performances. Mokchae Konghak 34(2): 46-57.
  14. Ross, R. J. and R. F. Pellerin. 1991. NDE of green material with stress waves: Preliminary results rosing dimension lumber. Forest Prod. J. 41(6): 57-59.
  15. Ross, R. J., J. C. Ward, and A. Tenwolde. 1994. Stress wave nondestructive evaluation of wet wood. Forest Prod. J. 44(7/B): 79-83.
  16. Sobue, N., H. Nakano, and I. Asano, 1984. Vibrational properties of spruce plywood for musical instruments. Mokuzai gakkaishi 31(1): 93-97.

Cited by

  1. Nondestructive Bending Strength Evaluation of Miscanthus sinensis var. purpurascens Ceramics Made from Different Carbonizing Temperatures vol.42, pp.6, 2014, https://doi.org/10.5658/WOOD.2014.42.6.723