Piezoresistive Property of Carbon Fiber Reinforced Plastics

Carbon fiber reinforced plastics (CFRP) were prepared by manual molding technology and the effect of loading speed on the piezoresistive property of CFPR was discussed. The piezoresistive sensitivity of CFRP with the different content of carbon fibers was contrasted and the interface morphology of CFRP was observed by SEM. The results show that CFRP has the obvious piezoresistive property and it can provide early warning as a kind of strain sensor. The piezoresistive sensitivity of CFRP decreases as the increasing of the content of carbon fibers in CFRP. Moreover the piezoresistive sensitivity of CFRP reduced as the increasing of loading speed. The SEM showed that the interface was good between carbon fibers and epoxy resin.