Yarn morphology and mechanical performance analysis of 3D angle-interlock woven composites with warp insertions
In 3D angle-interlock woven structures,warp and weft yarns are indispensable components,and their mor-phology significantly affects the mechanical properties of composite materials.Current research on three-dimensional angle-interlock woven composites primarily describes the internal yarn patterns as straight weft yarns and curved warp yarns.This study investigates changes in yarn morphology in 3D angle-interlock woven composite materials by adjust-ing the arrangement and density of warp yarns and warp insertions.Five different structural specimens were designed,and quasi-static bending and compression tests were conducted to analyze their mechanical properties.The results in-dicate that changes in the arrangement density of warp yarns and warp insertions lead to transformations in the mor-phology of warp and weft yarns.By decreasing the density of warp yarns and warp insertions and increasing the spac-ing between adjacent warp yarns,the torque effect of warp yarns is enhanced,causing weft yarns to transform from a straight state to a bent state,and warp yarns to transform from a bent state to a straight state.The bending and com-pression performance of the specimens is significantly affected by the bending wave height of the yarns.Specimens with greater bending wave height exhibit higher bending strength and lower bending modulus.Specimens with a lower degree of yarn bending in the loading direction exhibit higher compression strength and compression modulus.
3D angle-interlock woven with warp insertionscomposite materialsyarn morphologymechanical per-formance
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