Journal of agriculture & life science (농업생명과학연구)

Institute of Agriculture & Life Science, Gyeongsang National University (경상대학교 농업생명과학연구원)
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Nondestructive Evaluation of Strength Property for Damaged Black Pine Wood(Pinus thunbergii) by Matsucoccus thunbergianae Using Free Vibration Mode

  • Won, Kyung-Rok (College of Agriculture & Life Science, Gyeongsang National University) ;
  • Yoo, Byung-Oh (Southern Forest Research Center, Korea Forest Research Institute) ;
  • Lee, Kwang-Soo (Southern Forest Research Center, Korea Forest Research Institute) ;
  • Jung, Su-Young (Southern Forest Research Center, Korea Forest Research Institute) ;
  • Chong, Song-Ho (Forest Training Institute, Korea Forest Service) ;
  • Byeon, Hee-Seop (College of Agriculture & Life Science, Institute of Agriculture and Life Science, Gyeongsang National University)
  • Received : 2013.09.09
  • Accepted : 2013.11.28
  • Published : 2013.12.31
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Abstract

Nondestructive evaluation (NDE) technique method using a resonance frequency by free vibration mode was carried out for damaged and sound black pine woods( Pinus thunbergii ) by Matstucoccus thunbergianae in order to utilize damaged trees. There were a close relationship of dynamic modulus of elasticity and static bending modulus of elasticity to MOR. 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 in all conditions. 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 free vibration mode is more useful as a nondestructive evaluation method for predicting the MOR of sound and damaged woods by Matstucoccus thunbergianae.

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References

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