Modeling the Stress Transfer between Carbon Nanotubes and a Polymer Matrix during Cyclic Deformation
Raman spectroscopy was used in this study to investigate the cyclic deformation behavior of the single-walled carbon nanotubes (SWNTs)/epoxy composites. The stress transfer between the nanotube and epoxy resin has been followed through the stress-induced variation of the G' Raman band position of the nan-otubes. A hysteresis loop was found between the loading and unloading cycles and its size decreased with the increase of the deformation cycles. The energy dissipated in the composite and at the interface between the nanotube and matrix has been modeled from the loop area. The amount of interface damaged for each loading cycle was further predicted from the estimated dissipation energy.
KeywordsResidual Stress Band Position Stress Transfer Cyclic Deformation Loop Area
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