Journal of the Korean Wood Science and Technology
- 제23권2호
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- Pages.32-36
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- 1995
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- 1017-0715(pISSN)
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- 2233-7180(eISSN)
소나무 압축응력재(壓縮應力材)의 동(動) 탄성율(彈性率)과 내부마찰(內部摩擦)
Dynamic MOE and Internal Friction of Compression Woods in Pinus densiflora
- Hong, Byung-Wha (College of Agriculture, Gyeongsang National University) ;
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Byeon, Hee-Seop
(College of Agriculture, Gyeongsang National University)
- 투고 : 1994.11.28
- 발행 : 1995.06.30
초록
A study was conducted to evaluate the dynamic mechanical properties (modulus of elasticity, resonant frequency and interanal friction) of compression wood in Pinus densiflora. Vibration method was used for estimation of dynamic modulus of elasticity and the values were compared to those of static bending modulus of elasticity. The results obtained are as follows: 1. The dynamic modulus of elasticity of compression wood decreased, whereas that of normal wood increased, with increasing specific gravity. 2. The resonant frequency of compression wood decreased, whereas that of normal wood increased, with increasing specific gravity. 3. The internal friction of compression wood increased with increasing specific gravity. 4. The correlation coefficients between dynamic and static moduli of elasticity in compression and normal woods were high.