织物结构对多向三维机织复合材料力学性能的影响OA

In this paper,two kinds of composite materials reinforced with different fabric structures were de-signed and developed.Based on this new multi-layered multi-directional angle-knitted structure,the damage evolu-tion mechanism of the warp and weft loaded specimens and its correlation with the fabric structure were systematically characterized through multiaxial mechanical testing(tension,compression and in-plane shear),combined with digital image correlation(DIC)technology and failure interface micro-topography analysis.Experimental data show that three-dimensional multi-directional woven composites made from different fabric structures have different effects on their mechanical properties due to different volume content and aggregation state of internal load-bearing fibers.Com-posites with a higher volume content of load-bearing fibers and a concentrated distribution structure exhibited signifi-cantly improved mechanical performance.