Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Determination of True Modulus of Elasticity and Modulus of Rigidity for Domestic Woods with Different Slenderness Ratios Using Nondestructive Tests

서로 다른 세장비에 대한 비파괴실험으로 국산재의 실질탄성계수와 전단탄성계수 결정

  • Cha, Jae Kyung (Department of Forest Products and Life Science, College of Forest science, Kookmin University)
  • 차재경 (국민대학교 임산생명공학과)
  • Received : 2014.08.08
  • Accepted : 2014.09.29
  • Published : 2015.01.25
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Abstract

This study examined true modulus of elasticity (MOE) and modulus of rigidity (G) for domestic woods with different slenderness ratios (L/D) using the static bending and stress wave tests. Bending properties of small clear wood specimen of three domestic wood species were determined at 12% moisture content. The results of this study indicated that both MOR and MOE of domestic woods were affected by the slenderness ratio. As the slenderness ratio increased, MOR and MOE increased. G and true MOE of domestic timber beams were obtained at different slenderness ratios by flexure test and stress wave test. The values reported here can be useful if these species woods are used for structural purposes. However, the reported values are only indicative and do not represent the true average of wood species due to the limited number of specimens tested.

국산재에 대한 전단탄성계수와 실질탄성계수를 구하기 위해 서로 다른 세장비에 대한 휨강도실험 및 응력파실험을 실시했다. 국산재의 휨 성질들은 12%로 조습 처리된 무결점 시편으로 측정하였다. 휨강도와 탄성계수는 세장비(L/D)에 영향을 받아 세장비가 증가하면 증가하였다. 전단탄성계수(G)와 실질탄성계수는 서로 다른 세장비에 대한 휨강도 실험 및 응력파실험의 결과를 이용하여 계산했고, 그 값들은 국산재가 구조용도로 사용된다면 유용할 것이다. 하지만 이들 결과들은 제한된 수의 시편들에 대한 값으로 이들 수종의 실질 평균값을 나타내진 않는다.

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References

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