论文部分内容阅读
为了获得三维全五向编织预制件的渗透率数据,并研究其随编织工艺参数变化的规律,基于三维全五向编织复合材料内部单胞细观结构和编织预制件孔隙的双尺度特点,建立了用于进行编织预制件渗透率仿真计算的模型。施加周期性边界条件,利用Fluent的两相流模型,对三维全五向编织预制件沿轴向和垂向的树脂填充过程进行仿真计算,获得了不同编织角下预制件的轴向和垂向的非饱和渗透率。同时利用径向法实验对不同编织角的三维全五向编织预制件的渗透率进行了测量。将实验结果与仿真计算结果进行对比,两者的渗透率随编织角变化趋势一致,实验值与计算值吻合较好。
In order to obtain the permeability data of three-dimensional all-five-weave preform and to study its variation with the parameters of the braiding process, based on the double-scale characteristic of single-cell mesostructure and the porosity of braided preform in the three-dimensional all-five-directional braided composites The model used to simulate the permeability of braided preforms. Applying the periodic boundary conditions, the two-phase flow model of Fluent is used to simulate the axial and vertical resin filling process of three-dimensional full five-directional braided preform. The axial and vertical Unsaturated permeability. At the same time, the permeability test of three-dimensional all-five-weave preform with different braiding angle was measured by radial test. The experimental results are compared with the simulation results. The permeability of the two shows the same trend with the braid angle, and the experimental values are in good agreement with the calculated ones.