Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
권호 표지
DOI QR코드

DOI QR Code

The Change of Ultrasonic Transmission Velocity by Wood Decay

  • Received : 2013.03.21
  • Accepted : 2014.03.19
  • Published : 2014.03.25
Download PDF
⟨ Previous Next ⟩

Abstract

The deterioration in wood by the brown-rot fungus (Fomitopsispalustris) and the white-rot fungus (Trametesversicolor) were measured using ultrasonic velocity. Those were used for the decay exposure and 4 wood species of wood as the test specimens, Pinusdensiflora, Larixkaempferi, Pinuskoraiensis and Pinusrigida, were chosen with both the brown- and white-rot culture petridish during 12 weeks. After 12 weeks, the decrease rate of ultrasonic velocity was measured at 10~15%. In both brown- and white-rot exposure experiments, P. rigida showed significant decrease in ultrasonic velocity (20%), L. kaempferi on the other hand did not show decrease in ultrasonic velocity. After the fungal exposure experiment, the inside of specimens was investigated by computer tomography (C/T). After C/T investigation, bending tests were performed.

Keywords

References

  1. Kim, Y. S, J. H. Yoon, H. Y. Kang, and S. J. Park. 2007. Deterioration and Preservation Technique of Wooden Cultural Properties (Part.I)- Biodeterioration of Wooden Round Columns, Janggeongpanjeon, Built in 15 century- Journal of the Korean Wood Science and Technology. 35(1): 51-63.
  2. Kim, Y. S. and S. M. Han. 2007. Deterioration and Preservation Technique of Wooden Cultural Properties (Part.II)-Biodeterioration of Square Post to Support Wooden Printing Blocks Shelves, Janggengpanjeon. Journal of the Korean Wood Science and Technology. 35(1): 64-72.
  3. Korean Standards Association. 2004. Method of bending test for wood. KS F 2208.
  4. Lee, J. J., G. M. Kim, and M. S. Bae. 2003. Transmission Process for Ultrasonic Wave in Wood. Journal of the Korean Wood Science and Technology. 31(2): 31-37.
  5. Lee, S. J., G. H. Kim, and J. J. Lee. 2008. Effect of brown-rotted wood on mechanical properties and ultrasonic velocity. Journal of the Korean Wood Science and Technology. 36(5): 24-32. https://doi.org/10.5658/WOOD.2008.36.5.024
  6. Park, J. C. and S. I. Hong. 2008. Determination of Localized Defects in Wood by the Transfer Time of Ultrasonic Waves. Journal of the Korean Wood Science and Technology. 36(1): 61-68. https://doi.org/10.5658/WOOD.2008.36.1.061
  7. Ross, R. J., L. A. Soltis, and P. Otton. 1998. Role of nondestructive evaluation in the inspection and repair of the USS Constitution. Journal of Preservation Technology. 27(2): 145-152.
  8. Ross, R. J., J. C. Ward, and A. TenWolde. 1992. Identifying bacterially infected Oak by stress wave nondestructive evaluation. Res Pap. FPLRP-512. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 6 p.
  9. Schad, K. C., D. L. Schmoldt, and R. J. Ross. 1996. Nondestructive methods for detecting defects in softwood logs. Res Pap.FPL-RP-546. Madison, WL-U.S. Department of Agriculture, Forest Service, Forest Products Laboratory.13 p.
  10. Saeed, Kazemi-Najafi., A. Shabafan, and G. Ebrahimi. 2009. Intermal decay in standing beech trees using ultrasonic velocity measurement. European Journal of Forest Ressearch. 128: 345-350. https://doi.org/10.1007/s10342-009-0269-3
  11. Son, D. W. and D. H. Lee. 2004. Wood Decay Detection by Non-destructive Methods. Journal of the Korean Wood Science and Technology. 32(4): 74-81.
  12. Son, D. W. and D. H. Lee. 2008. Evaluation on Termite Damage of the Traditional Wooden Building by Non-destructive Methods. Journal of the Korean Wood Science and Technology. 36(1): 21-29. https://doi.org/10.5658/WOOD.2008.36.1.021
  13. Wang, X., R. J. Ross, J. A. Mattson, J. W. Forsman, E.A. Geske, and M. A. Wehr. 2002. Nondestructive evaluation techniques for assessing modulus of elasticity and stiffness of small-diameter logs. Forest Prod. J. 52(2): 79-85.

Cited by

  1. Evaluation of Influences of Artificial Defect of Wood Deck Using Non-destructive Ultrasonic Testing vol.44, pp.1, 2016, https://doi.org/10.5658/WOOD.2016.44.1.1