Effect of angle interlocking/plain weave compound fabric system on mechanical properties of aramid epoxy resin composites

Abstract

Preform is one of the important factors affecting the mechanical properties of textile composites. To further reflect the influence of the preform structure on the mechanical properties of composite materials, the angle interlocking and plain weave structures are configured in a certain proportion to form a composite fabric with both structures. The results show that the compound fabric preform has a positive effect on the improvement of the mechanical properties of AERC. An increase in the proportion of angle interlocking organization configuration in the compound fabric system is beneficial to the increase in tensile strength of AERC. In this experiment, when the ratio of angle interlocking structure and plain weave structure in the compound fabric system is 3:1, the tensile strength of AERC increases significantly, which is 80.98% higher than that of AERC with angle interlocking preformed structure. When the preform is made of compound fabric, the bending properties of AERC are greatly improved, and the bending strength is also increased 1.20 times compared to the AERC with angle interlock structure as the preform. When the ratio of angle interlock weave and plain weave in the compound fabric system is 1:3, the bending strength of AERC increases 1.81 times the maximum. The proportion of two fabric structures in the compound fabric system has a significant impact on the impact properties of AERC. The increase in the proportion of plain weave in the compound fabric system is not conducive to the increase in impact strength of AERC, and the large proportion of corner interlock configuration is conducive to the increase in bending strength of AERC. When the ratio of angle interlocking structure to plain weave structure is 2:1, the AERC has the maximum impact strength of 33.14 KJ/m2, which is increased by 26.28%.