• Journal of the Korean Society for Nondestructive Testing
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• v.24 no.3
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• pp.233-239
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• 2004

Smart material is used in various applications such as for glass frame, for medical instruments and for a part of sensors. Smart composite materials ran be applied to a part of aircraft and to the on-line monitoring system for industrial structures, using the shape memory effect. However, it is very difficult to simulate and analyze the shape memory effect in smart composites. In this paper, a two dimensional axisymmetric model was proposed to analyze the smart composite of one fiber and matrix using the finite element method(FEM). The finite element analysis was carried out in two renditions of the room temperature(293K) and a higher temperature (363K). The results we.e compared with the experimental results to confirm the validity of the analysis. In addition, the acoustic emission(AE) technique was used to study the microscopic damage behavior and the effect of pre-strains on TiNi/A16061 shape memory alloy composite.

• The Science & Technology
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• v.29 no.5 s.324
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• pp.71-75
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• 1996

아프거나 피로를 느낄 때 말 또는 신음소리로 호소하듯 다리나 건물도 지나친 피로가 겹치거나 무너질 정도의 압력이 걸리면 스스로 이런 위급사태를 알리는 방법은 없을까? 지진이 일어날 때 스스로 보강하고 금이 가면 자발적으로 틈새를 메우는 다리나 건물을 만들 수는 없을까? 또 생물처럼 필요하다면 스스로 구조를 바꾸고 피해를 입으면 수리하고 나이를 먹으면 우아하게 은퇴할 수 있는 구조물을 만들 수 없을까? 21세기에는 이런 살아있는 지능재료들이 등장하여 성수대교와 삼풍백화점과 같은 대형구조물의 붕괴사건을 미리 막을 수 있게 될지 모른다.

• Composites Research
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• v.15 no.2
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• pp.55-63
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• 2002

• 기계와재료
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• v.14 no.4 s.54
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• pp.49-60
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• 2002

• 기계와재료
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• v.14 no.4 s.54
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• pp.6-15
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• 2002

• 기계와재료
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• v.13 no.1 s.47
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• pp.79-86
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• 2001

• Transactions of the Korean Society of Mechanical Engineers A
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• v.41 no.2
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• pp.81-85
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• 2017

Fiber-reinforced polymer composites, which are made by combining a continuous fiber that acts as reinforcement and a homogeneous polymeric material that acts as a host, are engineering materials with high strength and stiffness and a lightweight structure. In this study, a shape memory alloy(SMA) reinforced composite actuator is presented. This actuator is used to generate large deformations in single lightweight structures and can be used in applications requiring a high degree of adaptability to various external conditions. The proposed actuator consists of numerous individual laminas of the glass-fiber fabric that are embedded in a polymeric matrix. To characterize its deformation behavior, the composition of the actuator was changed by changing the matrix material and the number of the glass-fiber fabric layers. In addition, current of various magnitudes were applied to each actuator to study the effect of the heating of SMA wires on applying current.

• Journal of the KSME
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• v.44 no.6
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• pp.48-52
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• 2004

과거 10여 년 간 Electro-Active Polymer(EAP) 분야는 큰 변형을 낼 수 있는 지능재료들이 출현함에 따라 인공근육을 만들 수 있는 가능성으로 인해 많은 관심이 모아지고 있다. EAP는 외부의 자극에 따라 큰 변위를 생성할 뿐만 아니라 근육과 같이 탄력성이 있는, 다른 재료기술들이 낼 수 없는 특성과 성능을 가지고 있다. EAP가 갖는 생체근육과 같은 작동을 할 수 있는 가능성은 곧 공상과학의 꿈을 이루고자하는 희망을 갖게 하며 인류의 문명발전에 크게 기여할 것이다. EAP는 차세대 마이크로 로봇, 오락산업 또는 초소형 비행체의 구동과 같은 인공근육 작동기의 응용분야를 창출하고 있다. EAP 작동기의 응용성은 폭넓으며 새로운 기술혁신의 기대를 불러 일으키고 있다. (중략)

• Journal of the Korean Society for Railway
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• v.6 no.4
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• pp.252-256
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• 2003

Smart materials can adapt to changes of environment like living organs in nature such that they can maximize the performance and minimize the maintenance expense of engineering systems. Such materials have been paid attention ten years ago and applied in the area of industry, aerospace, transportation and civil structures. This paper summarizes smart material technology and shows some application examples in railway vehicles. Also, its future of smart material technology in railway vehicle technology is envisaged based on its possibility and practical aspect.

• The Science & Technology
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• v.33 no.1 s.368
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• pp.60-61
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• 2000