TY - GEN
T1 - Interfacial self-healing for advanced composites
AU - Blaiszik, B. J.
AU - Baginska, M.
AU - White, S. R.
AU - Sottos, N. R.
PY - 2009
Y1 - 2009
N2 - A method is developed for sequestration of healing agent filled microcapsules and catalyst to the reinforcement-matrix interface. Using a custom-built load frame, single glass fiber/epoxy microbond specimens are tested under an optical microscope. The crack front propagation is observed during debonding and subsequent healing events. High healing efficiency, as measured by recovery of interfacial shear strength after full interfacial failure, is demonstrated using encapsulated DCPD monomer and Grubbs catalyst. In addition, the effects of fiber surface functionalization on interfacial friction and interfacial shear strength are investigated. Since microcracking and interfacial failure of reinforcing fibers is one of the key failure mechanisms in composite materials, healing this damage at such an early stage may allow for a substantial increase in expected lifetime by preventing catastrophic growth of smaller flaws.
AB - A method is developed for sequestration of healing agent filled microcapsules and catalyst to the reinforcement-matrix interface. Using a custom-built load frame, single glass fiber/epoxy microbond specimens are tested under an optical microscope. The crack front propagation is observed during debonding and subsequent healing events. High healing efficiency, as measured by recovery of interfacial shear strength after full interfacial failure, is demonstrated using encapsulated DCPD monomer and Grubbs catalyst. In addition, the effects of fiber surface functionalization on interfacial friction and interfacial shear strength are investigated. Since microcracking and interfacial failure of reinforcing fibers is one of the key failure mechanisms in composite materials, healing this damage at such an early stage may allow for a substantial increase in expected lifetime by preventing catastrophic growth of smaller flaws.
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M3 - Conference contribution
AN - SCOPUS:84867852920
SN - 9781615676033
T3 - 24th Annual Technical Conference of the American Society for Composites 2009 and 1st Joint Canadian-American Technical Conference on Composites
SP - 255
EP - 262
BT - 24th Annual Technical Conference of the American Society for Composites 2009 and 1st Joint Canadian-American Technical Conference on Composites
T2 - 24th Annual Technical Conference of the American Society for Composites 2009 and 1st Joint Canadian-American Technical Conference on Composites
Y2 - 15 September 2009 through 17 September 2009
ER -