Composites Research

  • 제12권3호
  • /
  • Pages.45-54
  • /
  • 1999
  • /
  • 2288-2103(pISSN)
  • /
  • 2288-2111(eISSN)
한국복합재료학회 (The Korean Society for Composite Materials)
권호 표지

형상기억합금 선 작동기를 삽입한 복합적층 보의 좌굴 및 좌굴후 제어

Buckling and Postbuckling Control of a Composite Beam with Embedded SMA Wire Actuators

  • 최섭 (국방과학연구소) ;
  • 이정주 (한국과학기술원 기계공학과) ;
  • 서대철 (한국과학기술원 기계공학과) ;
  • 최선우 (항공우주연구소)
  • 발행 : 1999.06.01
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초록

본 연구에서는 형상기억합금 선을 편심하게 삽입한 복합적층 보의 좌굴 및 좌굴후 제어에 관한 실험결과를 나타내었다. 임계좌굴하중을 향상하기 위하여 형상회복모멘트의 특성을 활용하였다. 좌굴제어의 범위를 향상시키기 위해 페루프 제어를 사용하여 좌굴후 제어의 거동을 검토하였다. 이러한 좌굴제어 실험을 통하여, 임계좌굴하중을 증가시키고 좌굴모드가 반대방향으로 변화하는 거동을 보의 세장비 및 기하학적 초기결함, 형상기억합금 선의 삽입 위치 등을 고려하여 하중-변위의 결과로부터 정량적, 정성적으로 분석하였다. 적당한 형상회복모멘토를 이용하여 원하는 변형형상을 유지함으로써 외부하중을 받는 보의 좌굴후 제어에서도 적용할 수 있다.

In this paper, an experimental study on the buckling and postbuckling control of a laminated composite beam with eccentrically embedded SMA wire actuators is performed. For the purpose of enhancing the critical buckling load, buckling control is investigated through the use of reactive moment associated with the shape recovery force of SMA wire actuators. To improve the control authority for the buckling and postbuckling control of the SMA-composite beam, closed-loop control is used. The buckling and postbuckling control behaviours are presented and discussed qualitatively and quantitatively on loaddeflection plots considering the stacking sequence of the laminate, slenderness ratio of the beam and activation conditions of the SMA wire actuators. By maintaining the desired deflection shape with the proper reactive moment, buckling control can be extended to the postbuckling of the SMA-composite beam subjected to an external load.

키워드

참고문헌

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