Abstract This study analyses the damage tolerance of nanofibre interleaved composites when subjected to low velocity impact. Cross-ply glass/epoxy composite laminates are produced. Drop-weight impact and residual compressive strength measurements are performed on these laminates according to the ASTM D7136 and ASTM D7137 standards for a range of impact energies around the Barely Visible Impact Damage energy limit. Polyamide 6, polyamide 6.9 and polycaprolactone nanofibrous veils with two different veil densities are selected to assess their effect on the damage tolerance. The low velocity impact resistance of nanofibre interleaved laminates increases considerably compared to the virgin material. The (projected) damage area decreases up to 50–60%, especially at higher impact energies where the virgin material shows widespread delamination. As more energy is absorbed in the interleaved laminates by the nanofibres, less damage to reinforcing fibres and matrix resin is produced. Analysis of fracture surfaces shows that the development of nanofibre bridging zones is the main reason for the improved impact damage tolerance.

中文翻译：

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电纺纳米纤维交错层提高玻璃纤维增​​强复合材料层压板的低速抗冲击性

摘要 本研究分析了纳米纤维交错复合材料在低速冲击下的损伤容限。生产交叉层玻璃/环氧树脂复合层压板。根据 ASTM D7136 和 ASTM D7137 标准，对这些层压板进行落锤冲击和残余压缩强度测量，测量范围为几乎不可见冲击损伤能量极限附近的冲击能量。选择具有两种不同面纱密度的聚酰胺 6、聚酰胺 6.9 和聚己内酯纳米纤维面纱来评估它们对损伤耐受性的影响。与原始材料相比，纳米纤维交错层压板的低速抗冲击性显着增加。（预计）损坏面积减少了 50-60%，尤其是在原始材料表现出广泛分层的较高冲击能量下。随着纳米纤维在交错的层压板中吸收更多的能量，对增强纤维和基体树脂的损坏就会减少。断裂面分析表明，纳米纤维桥接区的发展是提高冲击损伤容限的主要原因。