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

형상기억합금 선 작동기를 삽입한 복합적층 보의 좌굴 및 좌굴후 제어

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

Abstract

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.

Keywords

References

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