Axial compressive properties of aramid⁃coated carbon⁃fiber⁃reinforced epoxy resins

doi:10.19491/j.issn.1001-9278.2022.04.004

Abstract

Abstract:

Aramid?filament?wrapped carbon fiber bundles were prepared using a covering method， and wrapped carbon?fiber?reinforced epoxy resins were prepared by means of a vacuum?assisted resin?transfer?molding method. The axial compressive properties of the resultant composites were measured using an electronic universal testing machine， and the effects of aramid?filament?wrapped parameters on their axial compressive fracture mode and compressive strength were investigated. The experimental results indicated that the aramid filament wrapping could improve the compressive strength of the composites. The compressive strength of the composites increased gradually with an increase in the density of the aramid filament. Compared to the unidirectional covering， the biaxial covering of the aramid filament could further improve the axial compressive strength. The number of reinforcing fiber bundles also affected the fiber buckling state， resulting in a further improvement in compressive strength.

Key words: filament wrapping, fiber reinforced resin, composite, axial compressive strength

CLC Number:

TQ323.5

RUAN Fangtao, XIA Chenglong, ZHANG Baogen, CAO Ye, LIU Zhi, XU Zhenzhen, ZHANG Jincao. Axial compressive properties of aramid⁃coated carbon⁃fiber⁃reinforced epoxy resins[J]. China Plastics, 2022, 36(4): 19-23.

Figures/Tables 8

Fig.1. Schematic diagram of aramid filament wrapped carbon fiber prepared by covering method

碳纤维束数量	缠绕方式	试样编号
1	单向	R₀	R₅	R₇	R₁₀
1	双向	S₀	S₅	S₇	S₁₀
2	单向	TR₀	TR₅	TR₇	TR₁₀
2	双向	TS₀	TS₅	TS₇	TS₁₀

Tab.1. Sample number of aramid filament wrapped CFRP

Fig.2. Aramid filament wrapped carbon fiber/epoxy resin sample

Fig.3. Compressive strength of carbon fiber/epoxy resin wrapped in different covering methods

Fig. 4. Buckling instability of fibers under compressive load

Fig.5. Schematic diagram of limiting fiber buckling by covering method

Fig.6. Compressive strength of covering carbon fiber/epoxy resin with one?way method

Fig.7. Compressive strength of covering carbon fiber/epoxy resin with two?way method

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