Influence of Hybrid Ratio on Mechanical Properties of Aramid/Carbon Hybrid Fiber Composites with Interwoven Structure

doi:10.19491/j.issn.1001-9278.2021.05.007

Abstract

Abstract:

To analyze the effect of hybrid ratio on the mechanical properties of intralayer hybrid composites， an aramid/carbon fiber-hybrid-reinforced fabric was prepared by interweave， and the blending ratio of carbon fiber in the reinforcement structure was adjusted by the ratio of aramid fiber to carbon fiber in the weft yarn system. The aramid/carbon fiber?reinforced epoxy composites with a hybrid structure were prepared by vacuum assisted molding， and their tensile， flexu?ral and impact properties were investigated. The results indicated that the heterogeneity of aramid and carbon fibers in the latitudinal reinforcement system had a negative effect on the tensile strength of the composites in the warp direction. The increase of hybrid ratio could inhibit the tensile and bending damage of the composites. In the weft direction， the tensile strength and bending strength of the composites increased by 6 and 4.04 times. The synergistic effect of aramid and carbon fibers leads to an improvement in the impact resistance of the composites as well as an optimal hybrid ratio.

Key words: carbon fiber, aramid fiber, hybrid composite, mechanical property

CLC Number:

TQ321.2

YANG Li, CHEN Yuan, DING Feng, XU Zhenzhen. Influence of Hybrid Ratio on Mechanical Properties of Aramid/Carbon Hybrid Fiber Composites with Interwoven Structure[J]. China Plastics, 2021, 35(5): 40-46.

Figures/Tables 10

Fig.1. Weave design and plane simulation of reinforcement

样品编号	芳纶：碳纤维的根数配置比
1^#	1∶0
2^#	1∶1
3^#	1∶2
4^#	1∶3
5^#	0∶1

Tab.1. Hybrid configuration ratio and sample number

样品编号	经向密度/ 根·（10 cm）^-1	纬向密度/根·（10 cm）^-1		混杂比/%
样品编号	经向密度/ 根·（10 cm）^-1	芳纶纤维	碳纤维	混杂比/%
1^#	80	132	0	0
2^#	80	64	64	15.98
3^#	80	39	78	23.57
4^#	80	30	90	29.43
5^#	80	0	118	53.05

Tab.2. Structure parameters and hybrid ratio of aramid carbon fiber interwoven fabric

Fig.2. Tensile strength of the composites

Fig.3. Tensile fracture modes of the composites

Fig.4. SEM of tensile fracture cross section of the composites

Fig.5. Tensile stress?strain curves of the composites

Fig.6. Flexural strength of the composites

Fig.7. Bending stress?strain curves of the composites

Fig.8. Impact strength of the composites

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