三维全五向编织预制件渗透率研究  

Research on permeability of 3D full five-directional braided preforms

作　　者：刘振国[1] 欧家骏 胡龙[1] 王一博[1] 黄祥[1] 

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《航空学报》2015年第7期2244-2250,共7页Acta Aeronautica et Astronautica Sinica

摘　　要：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 of 3D full five-directional braided preforms and study the law of its change with processing parameters, based on the micro-structure of the 3D full five-directional braided composites＇ inner unit cell and the double scale characteristics of braided preform porosity, a model for calculating the permeability of 3D full five-directional braided preforms is established in this paper. By applying periodic boundary condition, the axial and vertical filling processes of 3D full five-directional braided preforms are simulated using the two-phase model in Fluent, and the axial and vertical unsaturated permeability of the preforms with different braiding angles is obtained. At the same time, the permeability of 3D full five-directional braided preforms is measured by radial flow techniques. The experimental results are compared with the simulation results, both of which have the same trends with the change of braiding angles, and the experimental and calculated values are in good agreement.

关 键 词：复合材料 三维编织 渗透率 树脂传递模塑 径向法 

分 类 号：V254.2[一般工业技术—材料科学与工程] TB332[航空宇航科学与技术—航空宇航制造工程]