Abstract
The damage sensing capabilities of a glass fiber/carbon nanotube/vinyl ester multiscalecomposite containing a tailored electrically conductive network of multiwall carbonnanotubes (MWCNTs) is investigated. The tailored MWCNT network is achievedby manufacturing the composite into two architectures depending on the location ofthe MWCNTs within the composite: (1) randomly dispersed within the matrix, or (2)deposited onto the glass fibers. The former architecture was achieved by dispersingMWCNTs within the uncured vinyl ester resin, while the later architecture by depositingMWCNTs onto the glass fibers by using an ultrasonic-aided dipping deposition method.The damage sensing capabilities of the composite were investigated under quasi-statictension loading by using specimens with fibers oriented at 0° and 90° with respect tothe load direction for both composite architectures. In situ measurements of electricalresistance while loading the composite show distinctive features, which allow discerningbetween fiber breakage from matrix or fiber/matrix interfacial damage, dependingon the composite’s architecture and failure mode.
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