서지주요정보
형상기억합금 선을 삽입한 복합적층 보의 좌굴거동 및 제어 = Buckling behaviour and control of a laminated composite beam with embedded shape memory alloy wires
서명 / 저자 형상기억합금 선을 삽입한 복합적층 보의 좌굴거동 및 제어 = Buckling behaviour and control of a laminated composite beam with embedded shape memory alloy wires / 최섭.
저자명 최섭 ; Choi, Sup
발행사항 [대전 : 한국과학기술원, 1999].
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소장정보

등록번호

8010328

소장위치/청구기호

학술문화관(문화관) 보존서고

DME 99051

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초록정보

In this paper, an experimental and analytical 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. The increased critical buckling load and alteredde flection shape due to the effects of activation of embedded SMA wire actuators are represented qualitatively and quantitatively on the load-deflection behaviour record 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. Based on the experimental analysis, the new formula for the buckling behaviour, which is confined to a small deflection prior to the postbuckling, of a laminated composite beam with embedded SMA wire actuators is suggested. Based on the results of buckling control, the thermal buckling and postbuckling behaviours of a composite beam with embedded SMA wire actuators are also investigated experimentally and analytically. For the purpose of enhancing the critical buckling temperature and reduction of the lateral deflection for the thermal buckling and postbuckling, the characteristics of thermal buckling are investigated through the use of the shape recovery force associated with SMA wire actuators. The results of thermal buckling tests using uniformly heated and clamped composite beam specimens with embedded SMA wire actuatorsare presented and discussed. The temperature-load-deflection behaviour records present quantitatively how the shape recovery force affects the thermal buckling behaviour. A cross tangential method is suggested to calculate the critical buckling temperature on the temperature-deflection plot. The experimental results show that the shape recovery force reduces the thermal expansion of the composite laminated beam, which results in an increment of the critical buckling temperature and reduction of the lateral deflection of postbuckling behaviours. The new formula is also proposed to describe the critical buckling temperature of the laminated composite beam with embedded SMA wire actuators. Our results presented suggest that a composite structure embedded with SMA has a potential for aircraft and space structures which is subjected to mechanical loading and exposed to an elevated temperature which influences phase transformation of SMA wire actuators.

서지기타정보

서지기타정보
청구기호 {DME 99051
형태사항 xi, 98 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Sup Choi
지도교수의 한글표기 : 이정주
지도교수의 영문표기 : Jung-Ju Lee
수록잡지명 : "The shape control of a composite beam with embedded shape memory alloywire actuators". Smart Materials and Structures, vol. 7, no. 6, pp. 759-770 (1998)
학위논문 학위논문(박사) - 한국과학기술원 : 기계공학과,
서지주기 참고문헌 : p. 94-98
주제 좌굴 및 좌굴후 제어
형상회복력
열좌굴
Buckling and postbuckling control
Shape recovery force
Thermal buckling
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