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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Wood Science and Technology
Journal Basic Information
Journal DOI :
The Korean Society of Wood Science Technology
Editor in Chief :
Volume & Issues
Volume 19, Issue 4 - Dec 1991
Volume 19, Issue 3 - Sep 1991
Volume 19, Issue 2 - Jun 1991
Volume 19, Issue 1 - Mar 1991
Selecting the target year
Trends of Recent Development and Research for Wood Based Materials in Japan
Sasaki, Hikaru ;
Journal of the Korean Wood Science and Technology, volume 19, issue 3, 1991, Pages 3~6
An Anatomical Research on Liquid-Penetration and Penetration-Path of Wood
Kim, Yu-Jung ; Park, Sang-Jin ;
Journal of the Korean Wood Science and Technology, volume 19, issue 3, 1991, Pages 7~18
Solid Wood-Bending of Red Pine Lumber by Boiling Treatment
So, Won-Tek ;
Journal of the Korean Wood Science and Technology, volume 19, issue 3, 1991, Pages 19~26
This study was carried out to investigate the solid wood bending properties of red pine(Pinus densiflora S. et Z.)naturally grown in Korea by boiling treatment The specimens were green and their dimension was
. The optimum conditions for solid wood bending processing of pine lumber are shown in Table 6 and the minimum solid bending radius was 240 mm in boiling treatment. The effects of knot on the degradation of bending processing properties were very severe and the failures of diagonal and torn grained wood were 20% and 30% respectively.
Holding Strength of Screws in Domestic Particleboard and Medium Density Fiberboard (I) - Optimum Pilot Hole Diameter -
Lee, Phil-Woo ; Park, Hee-Jun ; Han, Yu-Soo ;
Journal of the Korean Wood Science and Technology, volume 19, issue 3, 1991, Pages 27~34
Screw withdrawal test was carried out on the face and edge of domestic particleboard and medium density fiberboard in order to evaluate optimum pilot hole diameter. The obtained results were as follows: 1. Maximum withdrawal strengths on the face and edge of particleboard were obtained with pilot hole diameters at about 50% of root diameters of screw. 2. Maximum withdrawal strength on the face and edge of medium density fiberboard were obtained with pilot hole diameters that were about 60% and 50% of root diameters of screw, respectively. 3. Withdrawal strength showed about 91% of maximum withdrawal strength when pilot holes were not pre bored at particleboard. but when pilot holes at 90% of root diameter of screw withdrawal strength showed about as 51.3% of maximum withdrawal strength. 4. Withdrawal strength showed about 88% of maximum strength when pilot holes were not used, but withdrawal strength indicated 55.4% of maximum strength in case of 90% of root diameters of screw. 5. Maximum withdrawal strength on the face of particleboard was about 70.5% higher than that of the edge, and however medium density fiberboard was about 19.6% higher than that of the edge.
Effect of Load Variation on Transition of Neutral Axis of Laminated Veneer Lumber (LVL)
Park, Heon ; An, Tae-Hwan ;
Journal of the Korean Wood Science and Technology, volume 19, issue 3, 1991, Pages 35~44
In this study, thickness 40mm glulams were composed of thickness 5mm, 10mm Quercus laminas and Pinus koraiensis laminas to study on the effect of load variation on transition of neutral axis of laminated veneer lumber(LVL). The transition of neutral axis was examined by strain variation, which was checked by strain gauge. amplifier, recorder, and strain meter. The elasticity of glulam was estimated by E =
/I and this estimated elasticity values were compared with the elasticity values of glulam in bending. The result obtained can be summarized as follows: 1. The location of neutral axis of glulam was effected by glulam composition methods 2. The neutral axis did not shift by load variation within proportional limit. 3. The estimated elasticity of glulam by E =
/I showed much lower value than the elasticity of glulam in bending.
Housing Market and Opportunities for Wood Frame Housing in Korea
Park, Moon-Jae ; Kim, Wae-Jung ; Han, Kap-Joon ;
Journal of the Korean Wood Science and Technology, volume 19, issue 3, 1991, Pages 45~52
To investigate opportunities for wood frame housing and to activate wood frame house construction, trends of construction activities. preference about housing, and building codes related to wood frame housing were discussed. And two models of wood frame house were developed and construction cost was analyzed to compare with comparative masonry houses. The results obtained were as follows: 1. While 77.8% of people prefer single-family houses, majority of people(74.9%), ironically, possess multi-family houses such as apartments Wood work cost was ratio of 4% of total building cost. while wood material cost accounted merely for 11 % out of total building material cost. 2. Building code was not major barrier to residential house at height under 13m. The building code regulated major structural member and family boder wall of multi-family house to be built with fire retardant material. 3. The proper wood frame house was analyzed of town house or villa type locating in suburban of big city with hot ondol system for the upper middle class. 4 There was no difference in construction cost between western style wood frame house and comparable masonry house, but construction cost for Korean style wood frame house is 27% higher than that of comparable masonry house. It was necessary to reduce materials and cost down by prefabrication technique for both style of wood frame house.
Bending Properties of the Composite Panel Composed of Particleboard and Apitong (Dipterocarpus grandiflorus) Veneer
Lee, Phil-Woo ; Yoon, Hyoung-Un ; Oh, Sei-Chang ;
Journal of the Korean Wood Science and Technology, volume 19, issue 3, 1991, Pages 53~61
Mechanical properties of composite panel made with 3mm thick Apitong(Dipterocarpus grandiflorus) veneer on each face of particleboard core of 4 different specific gravity were determined. The results obtained were as follows: 1. Measured MOR and MOE increased with an increased in specific gravity of particleboard core. 2. Test results showed that the difference in bending properties between flatwise bending and edgewise bending was present. The average MOE value of flatwise loading was higer than that of epdgewise loading. But it was shown reverse tendency in MoR and MOE. 3. The delamination between face veneer and core particle was found in flatwise bending but nell in edgewise. 4. These composite panel could be substituted for plywood and other panel materials in furniture making as considered suitable allowable stress and bending strength.
Analysis of Structural Performance of Wood Composite I and Box Beam on Cross Section Component (II) - Calculation and Analysis of Ultimate Loads -
Oh, Sei-Chang ; Lee, Phil-Woo ;
Journal of the Korean Wood Science and Technology, volume 19, issue 3, 1991, Pages 62~71
An evaluation of bending test of composite I and Box beams for determining the ultimate strength limit design criteria was presented. Maxium loads of composite I beams were found in beams composed of thicker upper flanges and/or vertical LVL flanges. These loads of plywood web beams were greater than those of PB web beams. Maximum loads of unsymmetrical box beams were less than those of symmetrical box beams. Thus, it took on different phase in box type beams. Ultimate loads of composite beams were greater than those of solid. The failure of composite beams were abrupt and failure mode was classified into following categories; Edgewise shear failure in web, delamination in flange-web joint, tension failure and tearing in LVL flanges, and web delamination. These failures of composite beams were appeared at the mixed mode. The influence factor affecting the performance of tested composite beams was shear strength of PB-web composite beams and compressive strength in plywood-web composite beams. It was also assumed that the influence factors on structural performance on composite beams were flange quality, web material and geometry of cross section. As one of the design methods resisting to compressive stress that was required in the case of small span to depth ratio and deep beams. composite I-beams composed of thicker upper flanges comparing to lower flanges were very effective in structural performance.
New Separation Technique of Crystalized Dihydroquercetin
Song, Hong-Keun ;
Journal of the Korean Wood Science and Technology, volume 19, issue 3, 1991, Pages 72~76
The new preparative separation techneque of dihydroquercetin (2, 3-trans-dihdroxy-3, 3', 4', 5, 7-pentahydroxydihydroflavonol) was investigated by liquid chromatography. Also some typical coniferous wood bark were examined for the sources of dihydroquercetin. The good sources of dihydroquercetin were Douglas-fir[Pseudotsuga menziesii] bark and pitch pine [Pinus rigida] bark. There is no dependance the produced place and species dihyroquercetin which is separated by silica-gel column chromatography was taken with white needle-like crystals. This crystals were very stable in the humidity and on the light. It also can stored very long without derivatives.
Anatomical Comparison between Compression Wood and Opposite Wood in a Branch of Ginkgo biloba L.
Eom, Young-Geun ;
Journal of the Korean Wood Science and Technology, volume 19, issue 3, 1991, Pages 77~85