Impact and post-impact properties of multiscale carbon fiber composites interleaved with carbon nanotube sheets. (15th February 2020)

• Record Type: Journal Article
• Authors: Xin, W.; Sarasini, F.; Tirillò, J.; Bavasso, I.; Sbardella, F.; Lampani, L.; De Rosa, I.M.
• Is Part Of: Composites. Number 183(2020)
• Publication Date: 2020-02-15
• Subjects: Carbon nanotubes -- Polymer-matrix composites -- Impact behavior -- Damage tolerance; Composite materials -- Periodicals; Materials science -- Periodicals; Composite materials; Periodicals; Electronic journals; 620.118
• DOI: 10.1016/j.compositesb.2019.107711
• Languages: English
• ISSNs: 1359-8368

Abstract

Abstract: The effects of the integration of continuous sheets of randomly oriented multi-walled carbon nanotubes on the low velocity impact behavior of cross-ply carbon/epoxy laminates have been investigated. Three different energy levels were used, namely 5 J, 10 J, and 20 J and significant reductions in delaminated area in the range 11%–39% compared to the baseline laminates were achieved by incorporating interleaves at each 0/90 interface. This resulted in a better flexural damage tolerance of modified laminates. The combination of ultrasonic C-scans, profilometry, and scanning electron microscopy showed that interlaminar crossing between CNT sheets and carbon fibers occurred in modified laminates and that nanotube pull-out, bridging and improved fiber/matrix adhesion are the mechanisms responsible for the enhanced impact performance.