JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Evaluation of Influences of Artificial Defect of Wood Deck Using Non-destructive Ultrasonic Testing
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Evaluation of Influences of Artificial Defect of Wood Deck Using Non-destructive Ultrasonic Testing
Oh, Sei-Chang;
  PDF(new window)
 Abstract
Non-destructive ultrasonic testing was applied to evaluate the performance of wood deck material with hole as artificial defect. Ultrasonic velocities and modulus of elasticity were measured according to different diameters and numbers of holes, and comparative analysis to each data were done. From the results, ultrasonic velocities and modulus of elasticity decreased with an increase in the hole size and showed a negative linear correlation with the size of hole, respectively. As the hole size increased, ultrasonic velocities decreased, but their difference was small in the case of the hole size under 15 mm. Also, ultrasonic velocities and modulus of elasticity decreased with increasing the number of holes and showed a strong negative linear correlation to the number of holes. As the number of holes increased, ultrasonic velocities decreased to 3.5%, but modulus of elasticity decreased to 27%. Therefore, the number of holes showed greater influence to modulus of elasticity than ultrasonic velocity. Overall, the size and number of holes influenced to ultrasonic velocity and modulus of elasticity, and their influence will be greater as the size and number of holes increases. These results suggested that several ultrasonic parameters rather than a single ultrasonic velocity should be applied to detect small defects in wood decking materials.
 Keywords
non-destructive ultrasonic testing;wood deck;ultrasonic velocity;modulus of elasticity;
 Language
Korean
 Cited by
 References
1.
Carrasco, V.M., Teixeira, A.R. 2012. Methodology for inspection of wood pathologies sing ultrasonic pulses. Cerne, Lavras 18(3): 479-486. crossref(new window)

2.
Hwang, W.J., Lee, M.H., Park, Y.R., Lee, D.H. 2014. The change of ultrasonic transmission velocity by wood decay. Journal of the Korean Wood Science and Technology 42(2): 214-221. crossref(new window)

3.
Jang, S.J. 2000. Effect of moisture content and slope of grain on ultrasonic transmission speed of wood. Journal of the Korean Wood Science and Technology 28(2): 10-18.

4.
Kabir, M.F., Araman, P.A. 2002. Non-destructive evaluation of defects in wood pallet parts by ultrasonic scanning. 13th International Symposium on Nondestructive Testing of Wood, California, USA.

5.
Lee, J.J., Kim, G.M., Bae, M.S. 2003. Investigation of transmission process for ultrasonic waves in wood. Journal of the Korean Wood Science and Technology 31(2): 31-37.

6.
Lin, W., Wu, J. 2013a. Non-destructive testing of wood defects based on ultrasonic technology. Applied Mechanics and Materials 401-403: 1124-1128. crossref(new window)

7.
Lin, W., Wu, J. 2013b. Non-destructive testing of wood defects based on stress wave technology. TELKOMNIKA 11(11): 6802-6807.

8.
Lin, W., Wu, J. 2013c. Non-destructive testing of wood defects for Korean pine in Northwest China based on ultrasonic technology. Proceedings of IEEE International Conference on Signal Processing, Communication and Computing. Yunan, China.

9.
Mestre, P., Calcada, A., Carvalho, N., Serodio, C., Couto, P., Matias, J., Melo-Pinto, P., Morais, J. 2013. Low-cost ultrasonic probe to assess wood defects and parameters. Proceedings of the World Congress on Engineering Vol.II, WCE 2013, London, U.K.

10.
Park, C.Y., Kim, G.C. 2014. Evaluation of modulus of elasticity of wood exposed to accelerated weathering test by measuring ultrasonic transmission time. Journal of the Korean Wood Science and Technology 42(3): 275-281. crossref(new window)

11.
Park, J.C., Hong, S.I. 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.

12.
Raquel, G., Domingos, G.P.C., Chiara, B.S., Fernando, A.F.B. 2011. Behavior of ultrasonic waves propagation in presence of holes on Pequia (Aspidosperma desmanthum) wood. 17th International Nondestructive Testing and Evaluation of Wood Symposium, Sopron, Hungry.

13.
Shaji, T., Somayaji, S., Mathews, M.S. 2000. Ultrasonic pulse velocity technique for inspection and evaluation of timber. Journal of Materials in Civil Engineering Vol. 12(2): 180-185. crossref(new window)

14.
Yavari, A., Roohnia, M., Khademi-Eslam, H., Yavari, E. 2011. Hole influence and FFT variation inspection in poplar wood by free vibration method. 17th International Nondestructive Testing and Evaluation of Wood Symposium. Sopron, Hungry.