한국항공우주학회지 (Journal of the Korean Society for Aeronautical & Space Sciences)

  • 제39권1호
  • /
  • Pages.9-15
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  • 2011
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  • 1225-1348(pISSN)
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  • 2287-6871(eISSN)
한국항공우주학회 (The Korean Society for Aeronautical and Space Sciences)
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변형률 속도에 따른 형상기억합금 초탄성 거동의 실험 및 해석 연구

Experimental and Numerical Analysis for Superelastic Behaviors of SMAs with Strain-rate Dependence

  • 노진호 (한국항공대학교 항공우주 및 기계공학부) ;
  • 박정인 (한국항공대학교 항공우주 및 기계공학부) ;
  • 이수용 (한국항공대학교 항공우주 및 기계공학부)
  • 투고 : 2010.07.23
  • 심사 : 2010.11.25
  • 발행 : 2010.12.25
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초록

변형률-속도에 따른 형상기억합금의 초탄성 거동 특성 변화를 실험적 그리고 수치적으로 살펴보았다. 변형률-속도를 고려한 형상기억합금의 수학 모델을 유도하였고, 형상기억합금의 실험결과를 바탕으로 변형률 속도에 따른 형상기억합금의 열-기계적 특성변화를 관찰하였다. 변형률-속도의 변화에 따라 형상기억합금 시편의 급격한 온도변화가 일어남을 확인하였고 이런 현상이 초탄성 거동 특성 변화에 큰 영향을 미침을 예측 할 수 있었다.

The influence of the strain-rate on the superelastic behaviors of shape memory alloys (SMAs) wires is experimentally and numerically investigated. The one-dimensional SMA constitutive equations considering strain-rate effect is developed. The evolution of stress-strain curves of SMA wires is examined with various strain-rates. Results show that the superelastic behaviors of SMAs may significantly be changed depending on the variation of strain-rate.

키워드

참고문헌

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