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하성록(S. R. Ha),이경엽(K. Y. Rhee) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
It is well-known that the mechanical properties of MMT (montmorillonite) nanocomposites are better than those of conventional composites. One of problems in fabricating MMT nanocomposites is a dispersion of nanoparticles in the composites. In this study, tensile tests were performed using universal testing machine to determine the effect of clay reinforced on the MMT/epoxy nanocomposites. It was found that the elastic modulusof nanocomposites was higher than that of pure epoxy irrespective of surface modification. Because MMT clay hod Strain of nanocomposite as a result of reinforced effect.
해저환경에 따른 두께가 두꺼운 카본/에폭시 복합재의 파괴인성에 대한 실험적 연구
하성록(S. R. Ha),이경엽(K. Y. Rhee) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
It is well-known that the corrosive behavior of PMC (polymer matrix composite) structure is much better than the metal structure in the marine environment. The understanding of fracture behavior of PMC in the deep-sea environment is essential to expand its use in the marine industry. For a present study, fracture tests have been performed under four different pressure levels such as 0.1 ㎫, 100 ㎫, 200 ㎫, and 270 ㎫ using the seawater-absorbed carbon/epoxy composite samples. Fracture toughness was determined from the work factor approach as a function of hydrostatic pressure. It was found that fracture behavior was a linear elastic for all pressure levels. The fracture toughness increased with increasing pressure.
클레이 실란처리가 클레이/에폭시 나노복합재의 인장특성에 미치는 영향
하성록(S. R. Ha),이경엽(K. Y. Rhee) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
It is well-known that the mechanical properties of MMT (montmorillonite) nanocomposites are better than those of conventional composites. One of problems in fabricating MMT nanocomposites is a dispersion of nanoparticles in the composites. In this study, tensile tests were performed using universal testing machine to determine the effect of silane modification on the MMT/epoxy nanocomposites. It was found that the elastic modulus of silane modified nanocomposites was higher than that of pure epoxy irrespective of surface modification. Because MMT clay hod Strain of nanocomposite as a result of reinforced effect.