Dynamic mechanical analysis of magnetorheological nanocomposites filled with carbon nanotubes
Rui Li (UCI), Lizhi Sun (UC Irvine)
Prager Medal Symposium in honor of George Weng: Micromechanics, Composites and Multifunctional Materials
Mon 4:20 - 5:40
MacMillan 117
Magnetorheological (MR) elastomer composites with the addition of multi-walled carbon nanotubes are developed. The dynamic mechanical responses of the MR nanocomposites to applied magnetic fields are investigated through dynamic mechanical analysis. It is found that a small amount of carbon nanotubes can effectively improve the mechanical performance of conventional MR elastomers. The MR nanocomposites have shown not only large jumps in zero-field dynamic stiffness and damping, but also higher magnetic-field-induced improvement in these dynamic mechanical properties. In addition, a micromechanics-based viscoelastic constitutive model of nanocomposites was developed with a particular focus on the effect of imperfect interface between matrix polymer and carbon nanotubes.