형상기억합금을 이용한 지능형 고분자 복합재료의 설계

Design of an Intelligent Polymer-Matrix-Composite Using Shape Memory Alloy

  • 정태헌 (영남대학교 기계공학부) ;
  • ;
  • Jeong, Tae-Heon (Dept.of Mechanical Engineering, Yeungnam University) ;
  • ;
  • 발행 : 1997.10.01


Thermo-mechanical behaviors of polymer matrix composite(PMC) with continuous TiNi fiber are studied using theoretical analysis with 1-D analytical model and numerical analysis with 2-D multi-fiber finite element(FE) model. It is found that both compressive stress in matrix and tensile stress in TiNi fiber are the source of strengthening mechanisms and thermo-mechanical coupling. Thermal expansion of continuous TiNi fiber reinforced PMC has been compared with various mechanical behaviors as a function of fiber volume fraction, degree of pre-strain and modulus ratio between TiNi fiber and polymer matrix. Based on the concept of so-called shape memory composite(SMC) with a permanent shape memory effect, the critical modulus ratio is determined to obtain a smart composite with no or minimum thermal deformation. The critical modulus ratio should be a major factor for design and manufacturing of SMC.


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