Abstract: The composite hollow laminated beam embedded with pseudoelastic shape memory alloy (SMA) fibers was taken as the research object, and its motion equation was established by the virtual work principle based on classical laminated beam theory and the finite element method. The coupling of the phase transformation and material nonlinearity of SMA and the deformation of the matrix were considered. The Newmark integration method and the Newton iteration method were used to solve the motion equation. The vibration characteristics of the SMA hybrid composite hollow laminated beam were studied and the vibration suppression effect of SMA on the composite laminated beam was analyzed. The influence of temperature and structural damping on the dynamic response of the laminated beam was discussed. It was found that the free-end deflection of the hollow laminated beam embedded with SMA fibers is obviously decreased when compared with the hollow laminated beam without SMA fibers at the same time. Pseudoelastic SMA fibers show better vibration suppression effect at higher temperatures, and the vibration suppression effect of pseudoelastic SMA fibers on the laminated beam is much better than that of structural damping.

Key words: shape memory alloy (SMA) hybrid composite, finite element method (FEM), dynamic response, pseudoelasticity