• 한국응용과학기술학회지
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• 제26권1호
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• pp.69-73
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• 2009

Copper alloy metal fiber was incorporated into the conventional water-soluble metal working fluids to increase the antimicrobial activity. Fluid treated by copper alloy metal fiber is shown that bacteria is disappeared whereas that untreated metal fiber is increased bacteria as increasing the life time. When the electrochemical potential of Cu/Zn ion is -268mV, radicals with molecular oxygen are easily made. Especially, hydroperoxide radical shows strong toxicity to the strains, leading to the conformational change of plasma membrane. As a result antimicrobial activity of copper alloy metal fiber in metal working fluid is superior to that of copper fiber.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2009년도 춘계 학술대회 제21권1호
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• pp.241-242
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• 2009

본 연구에서 초고강도 콘크리트에 높은 연성을 얻기 위하여 Steel Fiber을 혼입하여 초고성능 콘크리트를 연구하였다. 기존의 Steel Fiber 와 Liquid Metal Fiber를 혼합한 초고강도 모르타르 시험체를 휨강도실험을 통하여 결과를 비교 검토 하였다. ASTM C 1018 방법, JSCE- SF4방법으로 인성지수 평가를 통해 Liquid Metal Fiber은 기존의 Bundrex Steel Fiber 보다 우수한 결과를 얻었다.

• 대한기계학회논문집A
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• 제27권3호
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• pp.372-380
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• 2003

Impact tests were conducted to study the effect of angle ply and metal laminate on impact damage characteristics of Fiber Metal laminates (FML). Impact tests were conducted using drop weight impact machine and damage behavior were analyzed by comparing with load-displacement curve and surface observation and microscopic observation of cross sections. The effect of angle ply on impact characteristics of FML are influenced by property of metal laminate. i.e., when the metal laminate is not enough to strong to prevent fiber debonding, Angle ply FML is superior to singly oriented ply (SOP) FML because angle ply enhance the stiffness by fiber supports and prevent (rack propagation. However, when the metal laminate is enough to strong to prevent fiber debonding, SOP FML is superior to Angle ply FML because the fiber of lower ply in Angle ply FML are more stressed than that of SOP FML.

• 한국응용과학기술학회지
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• 제24권3호
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• pp.233-237
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• 2007

This study is focused on the possibility of copper alloy metal fiber for an antimicrobial activity in the water soluble metal working fluids. Electrochemical potential of Cu/Zn ion is -268mV, and easily makes radicals with molecular oxygen. Especially, hydroperoxide radical shows strong toxicity to the strains. Plasma membrane causes conformational change when hydroperoxide radical binds to plasma membrane. Elution of copper ion from copper alloy metal fiber is detected in metal working fluid. As a result antimicrobial activity of copper alloy metal fiber in metal working fluid is superior to that of copper fiber.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2002년도 학술논문발표회
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• pp.47-50
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• 2002

This paper presents the results of fire resistance properties of high performance concrete varying with fiber kinds and the size of metal lath in order to verify the validities of fiber on the spatting resistance by fire. Metal lath, glass fiber and carbon fiber are used to confine the concrete. According to test results, plain concrete without lateral confinement and confined concrete with glass fiber and carbon fiber show entire failure after exposed to fire, while confined concrete with metal lath take place in the form of slight surface spatting by fire, which has favorable spatting resistance of concrete. As for the effect of the size of metal lath, when the size of metal lath is more than 1.2mm of thickness, the residual strength of concrete exposed to fire maintains more than 80% of its original strength. However, glass fiber and carbon fiber does not perform desirable spatting resistance by fire due to loss of lateral confinement of fiber exposed to fire caused by melting of fiber and reducing bond strength between concrete and fiber.

• 센서학회지
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• 제17권2호
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• pp.95-99
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• 2008

Various etching methods of optical fiber and formation of metal nano particles on the optical fiber have been proposed for fabrication of fiber optic localized surface plasmon resonance (FO LSPR) biosensors. Different types of etched optical fiber are possible by removing the cladding of optical fiber using HF (hydrofluoric acid) solution and BHF (buffered hydrofluoric acid) solution, which results in improved surface roughness when BHF solution is used. Localized surface plasmon can be formed and measured by formation of silver and gold nano particles on the etched optical fiber. The characteristics of the etched optical fiber and metal nano particles on the etched surface of the optical fiber play a key role in dictating the sensitivity of the LSPR sensors, so that the proposed results can be expected to be applied for related research on fiber optic based biosensors.

• 한국건축시공학회지
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• 제12권2호
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• pp.183-193
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• 2012

Compressive property of high strength concrete with amorphous metal fibers subject to high temperature has been investigated. The measure of this investigation includes explosive spalling, weight loss, residual compressive strength, strain at peak stress, elastic modulus, and residual energy absorption capacity after exposure to $400^{\circ}C$, $600^{\circ}C$and $800^{\circ}C$. In addition to the amorphous metal fiber, two other types of fibers (polypropylene fiber and hooked-end steel fiber) were also included in this investigation for comparison. The experimental program was conducted with high strength concrete using several combinations of the fiber types. The testing result shows that the concrete with amorphous metal fibers plus polypropylene fibers shows a superior behavior than those using other combination or single fiber type ingredient.

• 한국연소학회지
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• 제16권3호
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• pp.27-32
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• 2011

This study has numerically investigated the flame structure and emission characteristics in the metal fiber burner. The one-dimensional premixed flame approach has been adopted to simulate the combustion processes of the metal fiber burner. Numerical results indicate that the present approach is capable of predicting the essential combustion characteristics of the metal fiber burner. Based on numerical results, the detailed discussion has been made for the effects of equivalence ratio and thermal load on the precise flame structure and the pollutant emission in the metal fiber burner.

• 한국염색가공학회지
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• 제15권3호
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• pp.146-153
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• 2003

This article describes the metal ions adsorption of chitosan fibers. The chitosan fibers were manufactured by wet spinning using 2% acetic acid as solvent, 10% aqueous sodium hydroxide as non solvent, and 4%chitosan solution as a solvent. The adsorption characteristics of chitosan fibers towards 100ppm solutions of various metal ions such as Cu(II), Cd(II), Cr(III), Hg(II) were examined at different pH value by ICP-Atomic Emission Spectrometer. The adhesiveness of metallic ions to the chitosan fiber were increased with the increase of pH and the decrease of denier. On the other hand, from pH4, chitosan fiber that is immersed in metal ion aqueous solution of Cu(II) and Cd(II) became homogeneous solution because is dissolved. The adhesiveness of metallic ions to chitosan fiber were found to increased in a sequence of Hg(II)> Cr(III)> Cu(II)> Cd(II). The antimicrobial characteristics of the chitosan fiber by adhered metal ions, virgin chitosan fiber, and cotton fiber were evaluated. The antimicrobial activity of the fibers were increased with the decrease of denier.

• 대한기계학회논문집A
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• 제39권10호
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• pp.963-970
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• 2015

다양한 분야에서 금속 재료의 우수한 기계적 특성을 위해 경량화는 필수적이다. 최근에는 보다 효율적인 차체 경량화와 함께 내충격성 강화를 위하여 금속 부품 대신에 섬유 금속 적층판을 이용하는 연구가 활발히 진행되고 있다. 경량화를 위해서 자동차 및 항공기에서 복합재료나 샌드위치 구조로 이루어진 섬유 금속 적층판이 유용하다. 하지만, 섬유 금속 적층판 형태에 따른 기계적 특성이 도출되지 않은 실정이다. 본 논문에서는 적층판 두께 조합에 따른 특성 비교를 위하여 두께를 인자로 하고, 섬유 금속 적층판의 완전 요인 배치법으로 실험을 계획한다. 또한 유한요소 해석을 사용하여 알루미늄 판과 섬유 금속 적층판을 탄성과 소성 해석을 한다. 이를 통해 적층판 두께 조합에 따른 섬유 금속 적층판 형태에 따른 기계적 특성을 분석하고, 굽힘 대변형 거동을 예측하는 유한요소 해석모델을 구축한다.