Graphene Reinforced Epoxy Adhesive For Fracture Resistance
Graphene Reinforced Epoxy Adhesive For Fracture Resistance
复制标题
石墨烯增强环氧树脂粘合剂的抗断裂性
DOI：
10.1016/j.compositesb.2018.09.093
复制
发表时间：
2018-12-15
影响因子：
13.1
通讯作者：
Zou, Yun
中科院分区：
文献类型：
--
作者：
Jia, Zhemin;Feng, Xiaoping;Zou, Yun
在过去的几十年里，建筑胶粘剂的抗断裂性能引起了人们极大的关注。通过双悬臂梁(DCB)试件，对石墨烯纳米片(GNPs)增强环氧建筑胶粘剂的I型断裂性能进行了实验研究。实验结果表明，与纯环氧树脂相比，纳米复合材料的I型断裂韧性有所提高。值得注意的是，当石墨烯含量仅为0.25wt%时，纳米复合材料的I型断裂韧性比纯环氧胶提高了5倍。随着石墨烯含量的不断增加，胶粘剂的I型断裂韧性随着石墨烯在胶粘剂中的聚集而降低。用有限元分析方法预测了不同纳米复合材料粘结剂对DCB试件力学行为的影响。由实验结果得到的纳米复合材料的I型断裂性能被用作有限元分析中的粘聚区模型参数。预测结果与实验结果吻合较好。
The fracture resistance of construction adhesive has attracted tremendous interests in the past decades. This paper conducts an experimental study on the mode I fracture resistance of epoxy construction adhesive reinforced with graphene nanoplatelets (GNPs) through double cantilever beam (DCB) specimens. The experimental results show that the mode I fracture toughness of nanocomposites increases compared with the neat epoxy. It is worth noting that the mode I fracture toughness of nanocomposites at a graphene content of only 0.25 wt% exhibits a 5 times enhancement compared with neat epoxy adhesive. When the graphene content continues to increase, the mode I fracture toughness of adhesive decreases as the aggregation of graphene in adhesive. The mechanical behavior of the DCB specimens with different nanocomposites adhesive are predicted using finite elements analysis (FEA). The mode I fracture properties of nanocomposites obtained from the experimental results are used as cohesive zone model parameters in FEA. The prediction agrees very well with the experimental results.