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根据网络碳纳米管/环氧树脂(Reticulate Carbon Nanotubes/Epoxy,R-CNTs/EP)复合材料的结构特点,假设R-CNT均匀分布,建立了R-CNT/EP复合材料的三维有限元模型。利用有限元法分析了R-CNT/EP复合材料单胞的细观变形,用二尺度展开法计算了R-CNT/EP复合材料在不同应变下的有效刚度系数。分析结果表明:R-CNT/EP复合材料为各向异性材料,沿蒸汽流动方向的强度远大于其他方向的强度,且R-CNT的形状对R-CNT/EP复合材料的力学性能有显著影响,各刚度系数以及杨氏模量在Y型接头处各角相等时最大;R-CNT的体积分数对R-CNT/EP复合材料的力学性能有显著影响,各有效性能均随着R-CNT体积分数的增大而增大,但是增大程度不同。
According to the structural characteristics of the network carbon nanotubes / epoxy (R-CNTs / EP) composites, a three-dimensional finite element model of the R-CNT / EP composites was established assuming uniform distribution of the R- The mesoscopic deformation of the unit cell of R-CNT / EP composite was analyzed by finite element method. The effective stiffness coefficient of R-CNT / EP composite under different strain was calculated by two-scale expansion method. The results show that the R-CNT / EP composites are anisotropic materials, the strength along the steam flow direction is much greater than that in other directions, and the shape of R-CNT has a significant effect on the mechanical properties of R-CNT / EP composites , The stiffness coefficient and the Young’s modulus are the largest when the angles of the Y-joints are equal. The volume fraction of R-CNT has a significant effect on the mechanical properties of the R-CNT / EP composites. The increase of volume fraction increases, but the degree of increase is different.