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- 저자 : 쯔쯔미쥬이치(Juichi Tsutsumi) (검색결과 1 건)
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구조용 목질재료의 전단파괴기구 해명을 위한 파면해석적 연구
김남훈(Nam Hun Kim),쯔쯔미쥬이치(Juichi Tsutsumi),홍순일(Soon Il Hong),이성재(Sung Jae Lee) 한국가구학회 1999 한국가구학회지 Vol.10 No.1
The ultrastructural characteristics of shear fracture surfaces of laminated wood prepared from major four Korean wood specimens were examined. Commercial urea and urethan resin were used as adhesives for laminated woods of both homospecies and heterospecies. The morphology of fracture surface was observed using an optical microscopy and scanning electron microscopy. Three anatomical failure types were recognized: intercell failure, intrawall failure and transwall failure.<br/> In dry specimen, failure occurred mainly in woods. Laminated woods of softwoods showed mostly intrawall failure and transwall failure of tracheids, and them of hardwoods indicated mainly intrawall failure and interwall failure. Laminated woods prepared with urethan resin showed coarse fracture surface, on the other hand, those prepared with an urea formaldehyde resin had clean surface.<br/> In wet specimen, failure occurred dominantly in glue line. Intrawall failure and flags were characterized in laminated wood prepared with urethan resin. In heterospecies laminated woods, failure was occurred mainly in softwood.<br/> Consequently, fracture morphology of laminated wood may be influenced by adhesives, moisture content, species and anatomical characteristics.<br/> Keywords: Fractography, Laminated woods, Shear stress, Morphology, Wood failure, Intrawall failure, Intercell failure, Transwall failure<br/>
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