• Title/Summary/Keyword: 재료시험

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Self-Sensing and Interfacial Evaluation of Ni Nanowire/Polymer Composites Using Electro-Macromechanical Technique (전기적 미세역학적 시험법을 이용한 Ni nanowire강화 고분자 복합재료의 자체 감지능 및 계면 물성평가)

  • Kim, Sung-Ju;Yoon, Dong-Jin;Hansen George;DeVries K. Lawrence;Park, Joung-Man
    • Composites Research
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    • v.19 no.5
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    • pp.20-27
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    • 2006
  • Self-sensing and interfacial evaluation of Ni nanowire/polymer composites were investigated using electro-macromechanical technique, which can be used fur a feasible sensing measurement on tensile and compressive loading/consequent unloading, temperature, and humidity. Mechanical properties of Ni nanowire with different aspect ratio and adding contents in either epoxy or silicone composites were measured indirectly using electro-pullout test under uniform and non-uniform cyclic loadings. Comparing apparent modulus with the conventional mechanical tensile modulus of Ni nanowire/epoxy composites, the trends were consistent with each other. Ni nanowire/epoxy composites showed the sensing response on humidity and temperature. Self-sensing on applied tensile and compressive loading/unloading was also responded for Ni nanowire/silicone composites via electrical contact resistivity showing the opposite trend between tension and compression. It can be due to the different electrically-interconnecting mechanisms of dispersed Ni nanowires embedded in silicone matrix.

SP시험법에 의한 재료의 파괴강도 평가

  • 정세희;정희돈
    • Journal of the KSME
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    • v.28 no.4
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    • pp.387-393
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    • 1988
  • 본 SP시험법은 사용되는 시편이 미소하다는 장점 때문에 재질의 평가나 더불어 비파괴검사의 일환으로서 이용할 수 있음을 서명해 왔다. 현존하고 있는 거대구조물들의 잔존수명평가가 요 구되는 있는 지금, 정량적인 경년변화측정방법으로서 SP시험법은 높은 가능성을 내포하고 있는 시험법으로 여겨지며, 이 방법을 현장에 정착시키기 위해선 산. 학. 연의 공동연구체제가 필요 하다고 할 수 있다.

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