The aim of this study was to identify the effect of material type (matrix and reinforcement) and process parameters, on the mechanical properties of 3D Printed long-fibre reinforced polymer composites manufactured using a commercial 3D Printer (Mark Two). The effect of matrix material (Onyx or polyamide), reinforcement type (Carbon, Kevlar®, and HSHT glass), volume of reinforcement, and reinforcement lay-up orientation on both Ultimate Tensile Strength (UTS) and Flexural Modulus were investigated. For Onyx, carbon fibre reinforcement offered the largest increase in both UTS and Flexural Modulus over unreinforced material (1228 ± 19% and 1114 ± 6% respectively). Kevlar® and HSHT also provided improvements but these were less significant. Similarly, for Nylon, the UTS and Flexural Modulus were increased by 1431 ± 56% and 1924 ± 5% by the addition of carbon fibre reinforcement. Statistical analysis indicated that changing the number of layers of reinforcement had the largest impact on both UTS and Flexural Strength, and all parameters were statistically significant.

中文翻译：

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3D打印的长纤维增强聚合物复合材料：增强材料的性质和加工参数对机械性能的影响

这项研究的目的是确定材料类型（基质和增强材料）和工艺参数对使用商用3D打印机制造的3D打印长纤维增强聚合物复合材料的机械性能的影响（标记2）。研究了基体材料（On玛瑙或聚酰胺），增强材料类型（Carbon，Kevlar®和HSHT玻璃），增强材料的体积以及增强材料铺层取向对极限拉伸强度（UTS）和挠曲模量的影响。对于Onyx，碳纤维增强材料在UTS和挠曲模量方面的增幅均高于未增强材料（分别为1228±19％和1114±6％）。Kevlar®和HSHT也提供了改进，但意义不大。同样，对于尼龙，通过添加碳纤维增强材料，UTS和弯曲模量分别增加了1431±56％和1924±5％。统计分析表明，更改增强层的数量对UTS和抗弯强度的影响最大，并且所有参数均具有统计学意义。