Abstract
Determination of mechanical properties of 3D woven reinforcements is crucial for tailoring the required properties for end application. The current study presents an investigation of the mechanical performance of novel 3D woven composites’ structures. Various 3D woven fabrics with variation in stuffer yarn density were designed, produced and their mechanical properties such as tensile, shear, drop weight impact and compression after impact were investigated. Reinforcements were developed on a modified Dobby loom from flax yarn with four different levels of stuffer yarn densities. Machine modification ensured controlled amount of tension during reinforcement production for similar sets of yarns with similar crimp percentage. Composites were fabricated using these 3D woven fabrics as reinforcement and green epoxy as a matrix. It was observed that the impact and flexural properties are significantly improved by increasing stuffer yarn density.
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