Thermo-Mechanical Behavior of Short SMA Reinforced Polymeric Composite Using Shear tag Theory

전단지연 이론을 이용한 단섬유 형태의 SMA 보강 고분자 복합재료의 열변형 거동 해석

Thermo-mechanical behavior of discontinuous shape memory alloy(SMA) reinforced polymeric composite has been studied using modified shear lag theory and finite element(FE) analysis with 2-D multi-fiber model. The aligned and staggered models of short-fiber arrangement are employed. The effects of fiber overlap and aspect ratio on the thermomechanical responses such as the thermal expansion coefficient are investigated. It is found that the increase of both tensile stress(resistance stress) in SMA fiber and compressive stress in polymer matrix with increasing aspect ratio is the main cause of low thermal deformation of the composite.