静电纺聚氨酯纳米纤维膜对复合材料Ⅰ型层间断裂韧性的影响

Effects of Electrospun Polyurethane Nanofiber Film on Mode Ⅰ Interlaminar Fracture Toughness of Composites

使用静电纺聚氨酯(TPU)纳米纤维膜作为插层材料,研究其对复合材料Ⅰ型层间断裂韧性的影响。结果发现TPU纳米纤维膜插层增韧单向玻璃纤维复合材料的Ⅰ型层间断裂韧性随膜厚度的增加而增加,112.50μm厚TPU增韧的G_(IC-ini)和G_(IC-prop)达到1.622 kJ/m^(2)和2.587 kJ/m^(2),相对未增韧试样分别提高了467.13%和265.91%;TPU纳米纤维膜对多轴向玻璃纤维、单向碳纤维和缎纹碳纤维复合材料的层间断裂韧性都有很好的提高作用,G_(IC-ini)相对未增韧试样分别提高了135.91%、332.22%和404.27%,G_(IC-prop)相对未增韧试样分别提高了24.27%、197.09%和68.38%。表明TPU插层增韧对单向玻璃纤维复合材料具有最好的改善作用及抵抗层间破坏的能力。

Electrospun polyurethane(TPU)nanofiber films were used as the insert layer material,the effects of it on Mode I interlaminar fracture toughness of composites were studied.The results showed that the Mode I interlaminar fracture toughness of TPU nanofiber films inserted layer toughening unidirectional glass fiber composites increased with the increase of film thickness.The G_(IC-ini)and G^(IC-prop)toughened by 112.50μm thick TPU reached 1.622 kJ/m^(2)and2.587 kJ/m^(2),increased by 467.13%and 265.91%compared with the untoughened samples.The TPU nanofiber films had a good effect on improving the interlaminar fracture toughness of multiaxial glass fiber,unidirectional carbon fiber and satin carbon fiber composites.The G_(IC-ini) increased by 135.91%,332.22%and 404.27%,G_(IC-prop) increased by 24.27%,197.09%and 68.38%respectively compared with the untough-ened samples.It showed that TPU insert layer toughening had the best improvement effect on unidirectional glass fiber composites and the ability to resist interlaminar damage.