한국추진공학회지 (Journal of the Korean Society of Propulsion Engineers)

  • 제21권6호
  • /
  • Pages.15-20
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  • 2017
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  • 1226-6027(pISSN)
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  • 2288-4548(eISSN)
한국추진공학회 (The Korean Society of Propulsion Engineers)
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DIC법에 의한 입자강화 복합재료의 파괴에너지 및 변위장 특성

Fracture Energy and Displacement Field Characteristics of Particulate Reinforced Composites Using DIC Method

  • 투고 : 2017.01.25
  • 심사 : 2017.07.09
  • 발행 : 2017.12.01
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초록

본 연구에서는 입자강화 복합재료의 파괴에너지와 변위장 특성에 대하여 분석하였다. 재료가 노출될 수 있는 온도인 상온, $-40^{\circ}C$와 $-60^{\circ}C$에서 쐐기쪼갬 시험을 수행하여 각 온도에 따른 재료의 파괴에너지를 산출하였다. 변위장과 변형률장은 DIC법을 활용하여 가시화 하였으며, 변위장은 DIC를 이용한 표시추적방법에 의해 측정하였다. 시험 결과, 온도가 낮아질수록 파괴에너지는 감소하였다. 표면 변위장은 상온과 $-40^{\circ}C$에서 유사하였고, $-60^{\circ}C$에선 입자강화 복합재료의 취성거동으로 인하여 크게 감소하였다. 변형률장에선 온도가 내려갈수록 전체적인 변형률범위가 감소하였다.

In this study, the fracture energy and displacement fields characteristics of particulate reinforced composite is evaluated. Wedge splitting test was performed at various temperatures. Fracture energy of material is calculated at room temperature, $-40^{\circ}C$ and $-60^{\circ}C$. Displacement and strain fields of specimen surface were visualized by using digital image correlation. The surface displacement fields of the specimens were analyzed by mark tracking method using digital image correlation. The results showed that, the fracture energy was decreased as temperature decreased. The surface displacement fields at room temperature were similar to there at $-40^{\circ}C$. The surface displacement fields at $-60^{\circ}C$ was significantly reduced because of the brittle behavior. The strain fields of the specimen surface decreased as temperature decreased form room temperature to $-60^{\circ}C$.

키워드

참고문헌

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