Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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A study on the Thermal Buckling and Postbuckling of a Laminated Composite Beam with Embedded SMA Actuators

형상기억합금 선을 삽입한 복합적층 보의 열좌굴 및 좌굴후 거동에 관한 연구

  • 최섭 (국방과학연구소) ;
  • 이정주 (한국과학기술원 기계공학과) ;
  • 이동춘 (한국과학기술원 기계공학과)
  • Published : 1999.06.01
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Abstract

In this paper, the thermal buckling and postbuckling behaviour of composite beam with embedded shape memory alloy (SMA) wires are investigated experimentally and analytically. The results of thermal buckling tests on uniformly heated, clamped, composite beam embedded with SMA wire actuators are presented and discussed in consideration of geometric imperfections, slenderness ratio of beam and embedding position of SMA wire actuators. The shape recovery force can reduce the thermal expansion of composite laminated beam, which result in increment of the critical buckling temperature and reduction of the lateral deflection of postbuckling behaviours. It is presented quantitatively on the temperature-load-deflection behaviour records how the shape recovery force affects the thermal buckling. The cross tangential method is suggested to calculate the critical buckling temperature on the temperature-deflection plot. Based on the experimental analysis, the new formula is also proposed to describe the critical buckling temperature of a laminated composite beam with embedded SMA wire actuators.

형상기억합금 선을 삽입한 복합적층 보의 열좌굴 및 좌굴후 거동을 해석 및 실험적으로 고찰하였다. 균일한 온도분포, 양단고정 상태에서 형상기억합금 선을 삽입한 복합적층 보의 열좌굴 거동을 나타내었고 검토하였다. 삽입한 형상기억합금 선의 형상회복력은 복합적층 보의 열팽창 변형률을 감소시킴으로써 임계좌굴온도를 증가시키고 좌굴후 거동에서 횡방향 변형을 감소시키는 결과를 얻을 수 있었다. 형상회복력이 열좌굴에 미치는 영향을 온도-하중-횡방향 변위의 거동결과에서 세장비, 기하학적 초기결함, 형상기억합금 선의 삽입 위치 등의 설계변수를 고려하여 정량적으로 나타내었다. 온도-횡방향 변형의 결과로부터 임계좌굴온도를 구하는 접선교차점의 방법을 제안하였다. 열좌굴 및 좌굴후 거동에서 실험결과의 해석을 바탕으로 형상회복력이 임계좌굴온도에 미치는 영향을 나타내는 이론적인 식을 제시하였다.

Keywords

References

  1. J. of Aircraft v.30 no.1 Supersonic flutter of laminated thin plates with thermal effects Liaw, D.G.
  2. Compo. Struct. v.19 Thermal post-buckling behaviours of laminated composite plates with temperature-dependent properties Chen, L.W.;Chen, L.Y.
  3. J. of Thermal Stresses v.14 Thermal buckling and postbuckling of symmetrically laminated composite plates Meyers, C.A.;Hyer, M.W.
  4. J. of Thermal Stresses v.17 Experimental study of plate buckling induced by spatial temperature gradients Thornton, E.A.;Marshell, F.C.;McLeod, R.N.
  5. Technicla information of shape memory alloys
  6. Shape memory effects in alloys Perkins, J.
  7. Comp. Struct. v.38 no.1-4 Adaptive post-buckling response of carbon fibre composite plates employing SMA actuators Thompson, S.P.;Loughlan, J.
  8. Proceeding of the 33st sturctures,Structural,Dynamics and Materials conference Active buckling control of reinforced composite beams Baz, A.;Ro, J.;Mutua, M.;Gilheany, J.
  9. 복합재료학회 v.11 no.6 형상기억합금 선을 삽입한 복합적층 보의 좌굴제어 최섭;이정주;전제춘
  10. Smart Mater. and Struct. v.7 no.6 The shape control of composite beam with embedded shape memory alloy wire actuators Choi, S.;Lee, J.J.
  11. Proceeding of ASME AD 41 Buckling and postbuckling of shape memory alloy fiber-reinforced composite plates Zhong, Z.W.;Roger, R.C.;Chuh Mei;Pates Ⅲ,C. S.
  12. J. of Compo. Mater. Thermal buckling of laminated composite beam with embeded shape memory alloy actuators Choi,S.;Lee, J.J.;Lee, D.C.
  13. Thermal stresses Ⅲ Hetnarski, R.B.
  14. Stability and optimization of flexible structures Britvex, S.J.
  15. Theory of elastic stability Timoshenko S.;Gere. J.
  16. Int. J. Fracture v.43 Interface crack between two elastic layers Suo, Z.;Hutchison, J.H.
  17. Metallur Trans. A v.17 Deformation and trasition behavior associated with the R-phase in Ti-Ni alloys Miyazaki S.;Otsuka, K.
  18. JSME Int. J. v.A38 Cyclic deformation of TiNi shape memory alloy Tobushi H.;Lin, P.H.;Hattori, T.;Makita, M.
  19. J. of Intelligent Mater. Syst.and Sturct. v.1 One-dimensional Thermonechanical comstitutive Relations for shape memory materials Liang, C.;Rogers, C.A.
  20. J. of Mechanics for Phys. of Solids v.43 no.8 Thermome-chanical aspects of Niti Shaw, J.H.;Kyriakides, S.
  21. AIAA J. v.30 no.11 Buckling testing of composite columns Barbero, E.;Tomblin, J.
  22. J. of Applied Mechanics v.53 Note on southwell's method for buckling test of struts Tsai, W.T.
  23. Experimental Mech. v.15 Critique of southwel plots with proposals for alternative methods Spencer, H.H.;Walker, A.C.