Mechanical properties of carbon‐fiber‐reinforced epoxy composites modified by carbon micro‐ and nanofillers

Abstract

Hybrid composite materials reinforced with unidirectional fibers and small-scale micro-or nanoparticles provide benefits compared to traditional composites. The present paper shows the experimental investigation of carbonfiber-reinforced polymers modified by the addition of 0.5-5 wt% of milled carbon fibers and 0.1-0.5 wt% of single-wall carbon nanotubes. Both fillers were analyzed from technological point of view. The impact on mechanical and physical properties was revealed and discussed. Main attention was paid to quasi-static tensile and flexural properties as well as fatigue behavior under tension-tension mode. The maximal improvement in static tensile strength by 8.6% (from 682 to 741 MPa) and flexural strength by 14% (from 649 to 740 MPa) was achieved by the addition of 0.3 wt% single-wall carbon nanotubes. Short beam shear strength increased by 18%. Fatigue durability was highly improved as well. The strengthening mechanisms are attributed to the improvement of shear interfacial properties. In contrast to single-wall carbon nanotubes, milled carbon fibers enhanced the properties by 3%-9% only at static loading, while fatigue properties are negatively affected.

A study on graphene reinforced carbon fiber epoxy composites: Investigation of electrical, flexural, and dynamic mechanical properties

“…[1,2] Several reinforcements have been incorporated in CFRP composites during the last two decades. In this context, graphene, carbon nanotubes (CNTs), and carbon black have become attractive nanomaterials as the reinforcement agents in polymer nanocomposites, [3][4][5][6][7][8] and as the filler materials in CFRP composites. [9][10][11][12] Graphene, when compared to CNTs, has a higher specific surface area, higher compatibility with the polymeric matrix, and unique two-dimensional honeycomb lattice structure, [13,14] and therefore has a higher potentiality to contribute mechanical, thermal and electrical properties of CFRP composites.…”

Effects of functionalized graphene oxide modified sizing agent on the interfacial and mechanical properties of carbon fiber reinforced polyamide 6 composites

“…Similar findings were frequently reported when treating composite interface with carbon nanomaterials. [ 66–69 ]…”

Investigation on preparation and mechanical properties of carbon fiber fabric/hollow glass beads/epoxy resin sandwich composite laminates

“…The density of the samples was characterized by the drainage method. [ 27 ] The impact strength was tested on the PTM7000‐B simple‐supported beam impact testing machine according to GB/T 1043.1‐2008. [ 28 ] The flexural and tensile performance tests were all carried out on the Shimadzu‐AG‐X plus mechanical testing machine.…”