三维编织超高分子量聚乙烯纤维-碳纤维混杂增强环氧树脂复合材料摩擦磨损性能

Friction and wear properties of 3D braided UHMWPE fiber-carbon fiber hybrid reinforced epoxy composites

以超高分子量聚乙烯纤维(UHMWPE)-碳纤维(CF)三维混杂编织体为增强体,环氧树脂(ER)为基体,通过树脂传递模塑(RTM)工艺制备了三维编织混杂复合材料,研究了其摩擦磨损性能,并采用混合正压力模型对摩擦系数进行了预测。结果表明,在纤维总体积含量一定的情况下,随着CF体积含量的增加,复合材料的摩擦系数增大,而其比磨损率降低。UH3D/ER复合材料的磨损机制以粘着磨损为主,CF3D/ER复合材料则以磨粒磨损为主,混杂复合材料的磨损机制主要取决于CF与UHMWPE纤维的相对含量,通过调节UHMWPE纤维和CF的体积比例可实现对复合材料摩擦磨损性能的有效调控。采用的计算模型可较好地预测UH3D/ER的摩擦系数。

3D UHMWPE fiber and carbon fiber （CF） reinforced epoxy resin（ER）hybrid composites were prepared using resin transfer molding （RTM） process. The friction and wear properties were analyzed, and the friction coefficient was predicted by a hybrid positive pressure model. The results show that with the increase of the carbon fiber volume fraction of the hybrid composites with a fixed total fiber fraction of 36 %, the friction coefficient of the hybrid composites increases, and their specific wear rate decreases. The wear mechanisms of the UH3D/ER and CF3D/ER composites are mainly adhesive wear and abrasive wear, respectively. The wear mechanism of the hybrid composites is mainly determined by the relative volume ratio of CF to UHMWPE fiber. The hybrid positive pressure model can be used to predict the friction coefficient of UH3DD/ER composites.