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Investigation of the mechanical performance of carbon/polypropylene 2D and 3D woven composites manufactured through multi-step impregnation processes
Composites Part A: Applied Science and Manufacturing ( IF 8.7 ) Pub Date : 2019-12-15 , DOI: 10.1016/j.compositesa.2019.105733
Vijay Goud , Dilpreet Singh , Alagirusamy Ramasamy , Apurba Das , Dinesh Kalyanasundaram

In this work, pre-impregnation techniques including Dr. Ernst Fehrer (DREF) spinning and electrostatic powder coating were used to negate the poor impregnation of highly viscous thermoplastics. The DREF spun hybrid yarns and electrostatic spray coated towpregs were woven into 2D and 3D fabrics and subsequently consolidated to yield two variations of 2D and four variations of 3D composites including 3D angle inter-lock and 3D orthogonal weave. The 2D composites possessed higher tensile and flexural strength than the 3D composites. However, better notch impact properties were observed for 3D orthogonal weave. The closer wrapping in 3D orthogonal slightly improves the shock absorption capability of the composite than the angle interlock composite. Composites made from powder coated towpregs performed better than composites made from DREF spun hybrid yarns, minimizing the effect of the weave pattern. Porosity was a common feature of composites manufactured from DREF spun yarns as observed from micro-CT images.



中文翻译:

通过多步浸渍工艺生产的碳/聚丙烯2D和3D机织复合材料的机械性能研究

在这项工作中,使用了包括Ernst Fehrer博士(DREF)纺丝和静电粉末涂料在内的预浸渍技术来消除高粘度热塑性塑料的不良浸渍。将DREF纺制的混合纱线和静电喷涂的丝束编织物编织成2D和3D织物,然后进行固结以产生2D的两种变化和3D复合材料的四种变化,包括3D角度互锁和3D正交编织。2D复合材料比3D复合材料具有更高的拉伸强度和弯曲强度。但是,对于3D正交编织,观察到了更好的缺口冲击性能。与角度互锁复合材料相比,更紧密的3D正交包裹可以稍微提高复合材料的减震能力。由粉末涂层的丝束制成的复合材料的性能优于由DREF短纤混合纱线制成的复合材料,从而最大程度地减少了编织图案的影响。从微CT图像观察,孔隙率是由DREF纺制的纱线制成的复合材料的共同特征。

更新日期:2019-12-17
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