• 제목/요약/키워드: smart materials

검색결과 1,077건 처리시간 0.029초

Influence of SMAs on the attenuation of effects of P-Δ type in shear frames

  • Corbi, Ottavia
    • Steel and Composite Structures
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    • 제3권6호
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    • pp.403-420
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    • 2003
  • In the paper one investigates the benefits deriving from the introduction of SMA provisions in a structure subject to dynamic excitation and vertical loads. At this purpose one considers a multi-degree-of-freedom (mdof) shear elastic-plastic frame and designs couples of super-elastic SMA tendons to be placed at critical locations of the structure. Particular attention is focused on the reduction of $P-{\Delta}$ effects.

Development of $Binem^{(R)}$ Displays on Flexible Plastic Substrates

  • Barron, Cecile;Angele, Jacques;Bajic, Lorenzo;Dozov, Ivan;Leblanc, Francois;Perny, Sebastien;Specht, Jorg;Brill, Jochen
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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    • pp.289-292
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    • 2004
  • We have successfully fabricated $Binem^{(R)}$ displays on thin flexible plastic substrates. The fabrication is based on the standard $Binem^{(R)}$ process for glass which has been adapted to plastic with new materials and technologies. The first application is targeted to an embedded display for smart card products.

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Hydrogen Sensor Based on Palladium-Attached Fiber Bragg Grating

  • Lee, Sang-Mae;Sirkis, Jim-S.
    • Journal of the Optical Society of Korea
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    • 제3권2호
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    • pp.69-73
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    • 1999
  • This paper demonstrated the performance of a palladium wire hydrogen sensor based on a fiber Bragg grating as a means of developing a quasi-distributed hydrogen sensor network capable of operating at cryogenic temperatures. The new approach employing a fiber Bragg grating based palladium hydrogen sensor described in this study is advantageous over other traditional hydrogen sensors because of the multiplexing capability of fiber Bragg gratings. The sensitivity of the hydrogen sensor at room temperature is approximately 2.5 times that of the hydrogen sensor at cryogenic temperatures.

광섬유 센서를 이용한 원자력 발전소 격납구조물의 가동전 가압 팽창을 통한 구조건전성 시험

  • 김기수
    • Composites Research
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    • 제16권6호
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    • pp.56-61
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    • 2003
  • In this Paper, a fiber Bragg grating(FBG) sensor system is described and FBGs are well-suited for long term and extremely severe experiments, where traditional strain gauges fail. In the system. a reflect wave-length measurement method which employs a tunable light source to find out the center wave-length of FBG sensor is used. We apply the FBG system to nuclear energy Power Plant for structural integrity test to measure the displacement of the structure under designed pressure and to check the elasticity of the structure by measuring the residual strain. The system works very well and it is expected that it can be used for a real-time strain, temperature and vibration detector of smart structure.

전기유동유체를 이용한 공작기계 제어 (Control of ER Brake for Machine Tool)

  • 김기선;류교선
    • 한국산학기술학회:학술대회논문집
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    • 한국산학기술학회 2001년도 추계산학기술 심포지엄 및 학술대회 발표논문집
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    • pp.95-96
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    • 2001
  • 본 논문에서는 스마트재료 및 구조물(smart materials and structures : SMS)들 중 잠재적 응용가치가 가장 큰 것으로 인식되는 전기유동유체(electro-rhelogical fluid 이하 ER유체)의 이론적 근거 및 역학적 거동과 잠재적 응용성에 관한 연구이다. 이를 적용하기 위하여 공작기계의 브레이크에 적용하여 모델링 및 해석, 제어알고리즘 설계하여 정밀도에 양호한 결과를 얻었다.

Dynamic behavior of cracked ceramic reinforced aluminum composite beam

  • Selmi, Abdellatif
    • Smart Structures and Systems
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    • 제29권3호
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    • pp.387-393
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    • 2022
  • This paper presents the vibration analysis of cracked ceramic-reinforced aluminum composite beams by using a method based on changes in modal strain energy. The crack is considered to be straight. The effective properties of composite materials of the beams are estimated through Mori-Tanaka micromechanical model. Comparison study and numerical simulations with various parameters; ceramic volume fraction, reinforcement aspect ratio, ratio of the reinforcement Young's modulus to the matrix Young's modulus and ratio of the reinforcement density to the matrix density are taken into investigation. Results demonstrate the pronounced effects of these parameters on intact and cracked ceramic aluminum beams.

콘택트렌즈 소재 및 응용기술 (Contact Lens Materials and Applications)

  • 배우리;이동윤
    • 공업화학전망
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    • 제18권6호
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    • pp.21-28
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    • 2015
  • 콘택트렌즈는 시력 보정의 목적으로 개발되기 시작하여 최근에는 다양한 목적을 위해 이용되고 있다. 특히, 콘택트렌즈를 IT, NT, BT와 융합하여 질병 진단을 목적으로 이용하는데 관심이 높아지고 있다. 본지에서는 콘택트렌즈의 재료와 최근 주목받고 있는 진단용 콘택트렌즈와 소재에 대해 소개하고 앞으로 전망에 대해 논하였다.