摘要
由于具有优异的力学、电学和热学性能,碳纳米管(Carbon nanotubes,CNTs)被广泛用于高性能复合材料制备研究。然而,CNTs具有高长径比、高比表面能和强范德华力,在制备过程中易团聚,在高填料浓度下导致复合材料力学性能的降低。为了准确表征碳纳米管增强环氧树脂纳米复合材料(CNTs enhanced epoxy nanocomposite,CNTs/EP)的拉伸力学性能,通过实验和有限元模拟分析,表征了不同类型CNTs增强的CNTs/EP的拉伸力学性能。在考虑团聚对环氧树脂材料参数影响的情况,提出了折减团聚区域树脂材料参数的方法,改进了团聚分布数值分析方法。结果表明,在0.5wt%的低含量下,均匀分布数值分析方法可以准确预测CNTs/EP的拉伸强度和弹性模量;团聚分析方法准确预测了CNTs/EP在1.5wt%高浓度下的拉伸力学性能,弹性模量和拉伸强度的预测误差不超过5%。
Due to the excellent mechanical,electrical and thermal properties,carbon nanotubes(CNTs)are widely used in the research and preparation of high-performance composite.However,with the high aspect ratio,high specific surface energy and strong van der Waals force,CNTs intend to form agglomeration during the preparation process,causing a decrease in the mechanical property of the composite material at high concentration.In order to accurately characterize the tensile mechanical property of CNTs enhanced epoxy nanocomposite(CNTs/EP)nanocomposite,the tensile mechanical properties of different kinds of CNTs/EP were characterized by experiment and finite element analysis.Considering the influence of agglomeration on the material parameter of epoxy,a method for reducing the materials parameter of epoxy in the agglomeration region was proposed to improve the numerical analysis method of agglomeration distribution model.The results show that the uniform distribution numerical analysis method can accurately predict the tensile strength and elastic modulus of CNTs/EP at a low content of 0.5wt%.The agglomeration analysis method accurately predicts the tensile mechanical property,the error of elastic modulus and tensile strength of CNTs/EP are no more than 5%at a high concentration of 1.5wt%.
作者
曾利建
李仁府
陈宇轩
ZENG Lijian;LI Renfu;CHEN Yuxuan(Wuhan Second Ship Design and Research Institute,Wuhan 430205,China;School of Aerospace Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2024年第6期2909-2922,共14页
Acta Materiae Compositae Sinica
关键词
碳纳米管
环氧树脂
分散性能
力学性能
有限元
carbon nanotubes
epoxy resin
dispersion property
mechanical property
finite element method
