“…To distinguish the two new yarns, the former is called aramid core-spun yarn and the latter is called polyester core-spun yarn. Similarly, He et al 28 used the prepared silk-CF core-spun yarns (SCCYs) as a novel type of hybrid fiber reinforcement, and the results showed that the impact strength of silk-CF/epoxy resin composites (SCFECs) was greatly improved without compromising their static strength, ascribed to the distributed SCCYs in SCFECs with strategically located silk wraps at CF bundle-matrix interfaces that behave as the local energy absorbers and provide hoop confinement to individual CF bundles.Figure 1.(a) Aramid core-spun yarn; (b) Polyester core-spun yarn.…”
The impact resistant composite has excellent energy absorption efficiency, but the structure and material selection of the composite have great influence on its energy absorption. In order to explore the effect of structure on the energy absorption of Ultra-high molecular weight polyethylene (UHMWPE) composites and the application potential of new aramid core-spun yarn and new polyester core-spun yarn in impact resistant composites. The UHMWPE composites with different fiber orientations and stacking sequences structure, as well as the new hybrid composites containing aramid core-spun yarn and polyester core-spun yarn were tested by low-velocity impact test and scanning electron microscope (SEM) observation. The differences of energy absorption of UHMWPE composites with different structures and the advantages of the new hybrid composites were analyzed. The results show that the energy absorption of the 45°/0°/90°/−45° UHMWPE composite is 15% and 86% higher than that of the 0°/90°/0°/90°UHMWPE composite and the 0°/90°/45°/−45° UHMWPE composite, respectively, which is the best structure among the three composites. The energy absorption performance of the composites introduced with aramid core-spun yarn and polyester core-spun yarn were improved by 223% and 202%, respectively, so that the energy absorption performance was significantly improved by new yarns.
“…To distinguish the two new yarns, the former is called aramid core-spun yarn and the latter is called polyester core-spun yarn. Similarly, He et al 28 used the prepared silk-CF core-spun yarns (SCCYs) as a novel type of hybrid fiber reinforcement, and the results showed that the impact strength of silk-CF/epoxy resin composites (SCFECs) was greatly improved without compromising their static strength, ascribed to the distributed SCCYs in SCFECs with strategically located silk wraps at CF bundle-matrix interfaces that behave as the local energy absorbers and provide hoop confinement to individual CF bundles.Figure 1.(a) Aramid core-spun yarn; (b) Polyester core-spun yarn.…”
The impact resistant composite has excellent energy absorption efficiency, but the structure and material selection of the composite have great influence on its energy absorption. In order to explore the effect of structure on the energy absorption of Ultra-high molecular weight polyethylene (UHMWPE) composites and the application potential of new aramid core-spun yarn and new polyester core-spun yarn in impact resistant composites. The UHMWPE composites with different fiber orientations and stacking sequences structure, as well as the new hybrid composites containing aramid core-spun yarn and polyester core-spun yarn were tested by low-velocity impact test and scanning electron microscope (SEM) observation. The differences of energy absorption of UHMWPE composites with different structures and the advantages of the new hybrid composites were analyzed. The results show that the energy absorption of the 45°/0°/90°/−45° UHMWPE composite is 15% and 86% higher than that of the 0°/90°/0°/90°UHMWPE composite and the 0°/90°/45°/−45° UHMWPE composite, respectively, which is the best structure among the three composites. The energy absorption performance of the composites introduced with aramid core-spun yarn and polyester core-spun yarn were improved by 223% and 202%, respectively, so that the energy absorption performance was significantly improved by new yarns.
Hybrid fiber‐reinforced composites uniquely address the performance limitations of carbon fiber‐reinforced polymers (CFRPs). In this study, continuously wrapping large tow CF (48 K) with low‐cost nylon was proposed to create nylon‐CF core‐spun yarns (NCCYs). Unidirectional nylon‐CF/epoxy composites (NCFECs) were successfully fabricated using NCCYs as hybrid fiber reinforcement. The nylon wrapping on the CF significantly enhanced the energy absorption and dispersion of the CFRPs, thereby improving the impact strength. The measured impact strength of the NCFECs was 108.7 kJ/m2, which was 70.4% greater than that of the corresponding CF/epoxy composite (63.8 kJ/m2) with the same CF content. Additionally, NCCYs exhibited an excellent interfacial shear strength of 35.3 MPa, representing a 73.9% increase compared to that of the large tow CF (20.3 MPa). This study developed NCFECs using a simple and low‐cost process to produce advanced composites, providing an innovative manufacturing strategy for CFRPs with high impact resistance.Highlights
The NCCYs are prepared by using the wrapping technology.
The structure of the wrapped yarns endows the NCCYs with high interfacial shear.
The nylon fiber layer gives NCFECs higher impact strength.
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