Abstract Automated tape placement is seen as a promising technique for the manufacture of net-shape dry fibre preforms using carbon fibre tapes. However, most of the dry fibre tapes (DFT) available on the market are proprietary and aimed mainly at the aerospace sector. In the current study, two different binders (polyurethane and phenoxy water based binder) were used to coat and hence stabilise the carbon fibre tows. A net shaped preform was manufactured using Laser-Assisted Dry Fibre Tape Placement (LDFTP) and subsequently infused by vacuum assisted liquid resin infusion. The mechanical properties of the resulting laminates were compared to the laminates where the preform was manually laid up by hand with and without a coating (baseline). Failure mechanism analysis was carried out using scanning electron microscopy (SEM). The LDFTP process improved cured ply thickness (17–20% reduction) and fibre volume fraction (+9%). Interlaminar shear strength (ILSS) showed a significant improvement of 35–48%. However, only laminates manufactured using phenoxy coated LDFTP manufactured preforms showed comparable flexural strength to the uncoated baseline. Flexural modulus reduced in all cases. Further optimisation of binder content and process parameters (layup rate, consolidation temperature) is required for high speed deposition, better consolidation and improvements in mechanical properties.

中文翻译：

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使用自动干纤维带放置和液体树脂灌注制造的复合层压板的机械评估和失效分析。

摘要 自动铺带被视为使用碳纤维带制造网状干纤维预制件的有前途的技术。然而，市场上的大多数干纤维带 (DFT) 都是专有的，主要针对航空航天领域。在目前的研究中，使用两种不同的粘合剂（聚氨酯和苯氧基水基粘合剂）来涂覆并稳定碳纤维丝束。使用激光辅助干式纤维带放置 (LDFTP) 制造网状预制件，然后通过真空辅助液体树脂灌注进行灌注。将所得层压板的机械性能与其中预成型件手动铺设有涂层和无涂层的层压板进行比较（基线）。使用扫描电子显微镜 (SEM) 进行失效机制分析。LDFTP 工艺改进了固化层厚度（减少 17-20%）和纤维体积分数（+9%）。层间剪切强度 (ILSS) 显着提高了 35-48%。然而，只有使用苯氧基涂层 LDFTP 制造的预制件制造的层压板显示出与未涂层基线相当的弯曲强度。在所有情况下弯曲模量都降低。需要进一步优化粘合剂含量和工艺参数（铺层速率、固结温度）以实现高速沉积、更好的固结和机械性能的改进。只有使用苯氧基涂层 LDFTP 制造的预制件制造的层压板显示出与未涂层基线相当的弯曲强度。在所有情况下弯曲模量都降低。需要进一步优化粘合剂含量和工艺参数（铺层速率、固结温度）以实现高速沉积、更好的固结和机械性能的改进。只有使用苯氧基涂层 LDFTP 制造的预制件制造的层压板显示出与未涂层基线相当的弯曲强度。在所有情况下弯曲模量都降低。需要进一步优化粘合剂含量和工艺参数（铺层速率、固结温度）以实现高速沉积、更好的固结和机械性能的改进。