[논문]한국산 소나무의 지역(고성, 홍천 및 봉화군)에 따른 역학적 특성

Kim, Min-Ji; Kim, Ji-Yeol; Kim, Byung-Ro

doi:10.5658/wood.2020.48.5.666

초록
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본 연구는 태백산맥을 기준으로 영동(고성군), 영서(홍천군), 영남(봉화군) 세 지역 간 소나무의 재질 차이 유무를 알기 위해 역학적 특성을 조사하였다. 측정한 역학적 성질은 압축강도, 경도 및 전단강도였다. 압축강도는 미성숙재에서 지역 간 차이가 없으며, 심재부와 변재부에서는 봉화, 홍천, 고성군 순으로 크게 나타났다. 경도는 횡단면에서는 봉화군이, 방사 및 접선 단면에서는 고성군이 크게 나타났다. 전단강도는 심재부에서는 차이가 없었으며, 변재부에서는 봉화군이 고성, 홍천군에 비해 높게 나타났다. 이는 지역 간 가도관장, 마이크로피브릴경각 차이에 의한 것으로 생각된다. 지역 간 재질특성의 차이 규명으로 국내산 소나무재를 효율적이고 선택적으로 사용하여 부가가치를 높이고, 또한 우수한 수형목을 선발하는데 활용될 수 있을 것으로 생각한다.

Abstract ▼ AI-Helper

This study investigated mechanical characteristics of pine trees in Yeongdong (Goseong-gun), Yeongseo (Hongcheon-gun), and Yeongnam (Bonghwa-gun) to define differences in the material quality among pine trees of the three regions. The compressive strength, hardness and shear strength of pine trees o...

This study investigated mechanical characteristics of pine trees in Yeongdong (Goseong-gun), Yeongseo (Hongcheon-gun), and Yeongnam (Bonghwa-gun) to define differences in the material quality among pine trees of the three regions. The compressive strength, hardness and shear strength of pine trees of each region were measured. There were no differences in the compressive strength of the juvenile woods among the regions, while the heartwood and sapwood in Bongwha generally showed the highest compressive strength followed by those in Hongcheon and in Goseong. The hardness of the cross-section of pines in Bonghwa was the highest, and in terms of the hardness of the radial and tangential sections, pines in Goseong topped the list.. There were no difference among heartwoods of each region in terms of the shear strength, but, but sapwood from Bonghwa had higher shear strength than those of the other two regions, which may be attributed to differences in tracheid length and microfibril angle among pines in each region. This study identifies the quality differences among pines of different region, and therefore, is expected to add value by helping choose the domestic pine tree material effectively and selectively, and also select a plus tree.

주제어

표/그림 (5)

표 Table 1. Information on experimental samples
표 Table 2. Compressive strength of each province (N/㎟)
표 Table 3. Proportional limit stress of each province (N/㎟)
표 Table 4. Hardness of each province (N/㎟)
표 Table 5. Shearing strength of each province (N/㎟)

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문제 정의

, 2020) of Korean pine trees, pine trees show different qualities depending on regions and the features are associated with one another. Therefore, the purpose of this study is to define mechanical characteristics by regions by investigating mechanical features of pine trees from different regions and analyzing its relationship with genetic, physical, and microfibril angle features.
This study investigated mechanical characteristics of pine wood from different regions. The relationship with existing anatomical, physical and microfibril angle properties were analyzed to determine mechanical characteristics by regions.

제안 방법

This study investigated mechanical characteristics of pine wood from different regions. The relationship with existing anatomical, physical and microfibril angle properties were analyzed to determine mechanical characteristics by regions. Wood from Bonghwa showed higher compressive and shear strength in categories of both heartwood and sapwood, and wood from Goseong and Hongcheon showed significant differences in categories of heartwood and sapwood, however, wood from Bonghwa did not.

대상 데이터

The dimensions of the specimens were 2 cm (T) × 2 cm (R) × 3 cm (L), and one to six specimens were created for each part of wood to be measured on the tangential section.
The dimensions of the specimens were 4 cm (T) × 4 cm (R) × 4 cm (L),and three specimens were created for each part of wood.
The subjects are pine trees from Yeongdong (Goseonggun), Yeongseo (Hongcheon-gun), and Yeongnam (Bonghwa-gun) that were owned by the East Sea Wood Distribution Center under the National Forestry Cooperative Federation and were granted for in 2015. At the time of grant, the trees were in the form of about 20 cm-thick disks and their age, DBH (diameter of basal height), average tree-ring width, latewood proportion, and tree trimming year are shown in Table 1.

데이터처리

For the statistical analysis of the data, Duncan test was conducted using IBM SPSS Statistics 24, and the significance level was set at 0.05 for analysis.

이론/모형

Compressive strength was tested based on the compression test method of KS F 2206 wood. The dimensions of the specimens were set as 2 cm (T) × 2 cm (R) × 4 cm (L), and four to seven specimens were created for each of juvenile wood, heartwood, and sapwood.
Shear strength was tested based on the shear test method of KS F 2209 wood. The dimensions of the specimens were 2 cm (T) × 2 cm (R) × 3 cm (L), and one to six specimens were created for each part of wood to be measured on the tangential section.

성능/효과

76 N/㎟ and tangential sections. Comparing these values with the results of study, wood from Goseong showed higher values in terms of radial and tangential sections, but lower value on cross sections, and wood from Hongcheon showed higher values in terms of tangential and radial sections except for cross sections. Wood from Bonghwa showed higher values in all the sections.
(2018), there was no difference intracheid length among juvenile wood, but heartwood and sapwood in Bongwha had the longest tracheid, followed by those in Hongcheon, and those in Goseong. The compressive strength in this study was the highest among trees in the order of Bonghwa, Hongcheon, and Goseong, and it seems that the wood from Bonghwa showed higher strength than those of other regions because the tracheid in Bonghwa is longer than the ones in Goseong and Hongcheon. As for the relationship between microfibril angle and tracheid, it was reported that micro fibril angle decreases when the tracheid increases and vice versa (Watanabe, 1963; Hiller, 1964; Kim and Min, 1999; Rlee and Kim, 2005).

후속연구

The Duncan test which was conducted to examine any regional differences did not show any difference in heartwood, but wood from Bonghwa showed higher values than the ones from Goseong and Hongcheon. As it seems that lignin content, which is associated with adhesion strength, affects the results of the shear strength, additional chemical analysis is required. Cho (1994) reported that the shear strength of radial sections of pine wood was 9.

참고문헌 (16)

Cho, J.M. 1994. Wood properties and uses of the major tree species grown in Korea. Forestry Research Institute. Research Material No. 95. Seoul, Korea.
Han, G.S. 2015. Study on improvement site management system and supply system of timber for repairing culture properties. Cultural Heritage Administration. Daejeon Korea.
Han, M.S., Lee, C.J., Park, B.S., Kim, B.R. 2014. Studies on wood quality and growth of quercus rubra (24 Years old) in Korea: Physical and mechanical properties. Journal of the Korean Wood Science and Technology 42(3): 327-338.
Han, Y.J., Lee, H.M., Eom, C.D. 2016. Physical and mechanical properties of Korean red pine wood from different growth sites and correlations between Them. Journal of the Korean Wood Science and Technology 44(5): 695-704.
Hiller, C.H. 1964. Pattern of variation of fibril angle within annual rings of pinus attenuradiata. Res. Note FPL-034, U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, Madison, Wisconsin.
Jeong, G.H., Kim. B.R. 2015. Wood quality and growth of alnus glutinosa (L.) gaertn. in Korea: Compressive and bending strength properties. Journal of the Korean Wood Science and Technology 43(3): 287-294.
Kang, C.W., Kim, N.H., Kim, B.R., Kim, Y.S., B, H.S., Soe, W.T., Yoe,. H.M., Ho, S.W., Lee, W.H., Lee, H.Y. 2008. wood physics and mechanical. Hyangmoonsa, Seoul Korea.
Kim, B.R., Min, D.S. 1999. Studies on variability of wood properties in stem of pinus koraiensis (III): Variations in tracheid length and width, microfibril angle and compression strength in the longitudinal direction. Journal of the Korean Forest Energy 18(1): 1-5.
Kim, M.J., Kim, B.R. 2018. Physical characteristics of Korean red pines according to provinces (Goseong, Hongcheon and Bonghwa-gun). Journal of the Korean Wood Science and Technology 46(5): 437-448.

원문보기 상세보기
Kim, J.Y., Kim, S.C., Kim, B.R. 2020. Microfibril angle characteristics of Korean pine trees from depending on provinces. Journal of the Korean Wood Science and Technology 48(4): 569-576.

원문보기 상세보기
Kim, M.J., Seo, J.W., Kim, B.R. 2018. Anatomical characteristics of Korean red pines cording to provinces. Journal of the Korean Wood Science and Technology 46(1): 100-106.
Koch, P. 1985. Utilization of hardwoods growing on southern pine sites. vol. III. products and prospective. US Department of Agriculture Forest Service Handbook No. 605. Washington DC, USA.
Oh, S.W. 1997. Original articles: Relationship between compression strength parallel to grain and anatomical characters in pinus densiflora S. et. Z.. Journal of the Korean Wood Science and Technology 25(2): 27-32.
Park, B.S., Park, J.H., Han, S.U. 2006. Variation of material properties of Korean red pine of superior families. Journal of the Korean Forest Energy 25(2): 9-15.
Rlee. S.M., Kim. B.R. 2005. Studies on variability of wood properties within stem of larix kaemferi (2): Difference in tracheid length and width, microfibril angle, and strength in south and north sides of stem. Journal of the Korean Wood Science and Technology 33(1): 21-28.
Watanabe, H., Tsutsumi, J., Kojima, K. 1963. Studies on juvenil wood. I. Experiment on stems of sugi trees (Crytomeria japonica D. Don). Mokuzai Gakkaishi 9(6): 225-230.

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한국산 소나무의 지역(고성, 홍천 및 봉화군)에 따른 역학적 특성
Mechanical Characteristics of Korean Red Pines according to Provinces (Goseong, Hongcheon and Bonghwa-gun) 원문보기

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한국산 소나무의 지역(고성, 홍천 및 봉화군)에 따른 역학적 특성 Mechanical Characteristics of Korean Red Pines according to Provinces (Goseong, Hongcheon and Bonghwa-gun) 원문보기

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한국산 소나무의 지역(고성, 홍천 및 봉화군)에 따른 역학적 특성
Mechanical Characteristics of Korean Red Pines according to Provinces (Goseong, Hongcheon and Bonghwa-gun) 원문보기

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