采用径向法测量了三维编织预制件的渗透率,利用修正注入半径的循环方法,基于Visual C++计算了渗透率的大小,主渗透率方向分两步确定: 一是通过选择阈值的图像处理运算提取流动前沿; 二是采用Matlab中的非线性最小二乘法将所得轮廓进行椭圆拟合,并计算该椭圆长轴方向与编织方向的夹角.结果表明: 编织参数影响渗透率,当编织角一定时,随着纤维体积含量的增加,主渗透率降低; 当纤维体积含量一定时,随着编织角的增加,主渗透率降低,但主渗透率的方向不随编织角的变化而改变,始终保持与编织轴向一致.
参考文献
| [1] | 卢子兴,杨振宇,李仲平.三维编织复合材料力学行为研究进展[J].复合材料学报,2004,21(2):1-7.Lu Zixing,Yang Zhenyu,Li Zongping.Development of investigation into mechanical behaviour of three dimensional braided composites[J].Acta Materiae Compositae Sinica,2004,21(2):1-7. |
| [2] | 李嘉禄,孙颖,李学明.复合材料学报二步法方型三维编织复合材料力学性能及影响因素[J].复合材料学报,2004,21(1):90-94.Li Jialu,Sun Ying,Li Xueming.Research on the mechanical properties and the effectors of the two-step 3D braided composites[J].Acta Materiae Compositae Sinica,2004,21(1):90-94. |
| [3] | 李嘉禄,孙颖.二步法方型三维编织预制件编织结构参数与工艺参数[J].复合材料学报,2003,20(2):81-87.Li Jialu,Sun Ying.Braiding structure parameters and process parameters of the two-step rectangle 3D braiding preform[J].Acta Materiae Compositae Sinica,2003,20(2):81-87. |
| [4] | 李嘉禄,孙颖.二步法方型三维编织复合材料的细观结构[J].复合材料学报,2002,19(4):69-75.Li Jialu,Sun Ying.Microstructure of the two-step rectangle 3D braided composites[J].Acta Materiae Compositae Sinica,2002,19(4):69-75. |
| [5] | 邱婧婧,段跃新,梁志勇.RTM 工艺参数对树脂充模过程影响的模拟与实验研究[J].复合材料学报,2004,21(6):70-74.Qiu Jingjing,Duan Yuexin,Liang Zhiyong.Computer simulation and actual experiments of RTM mold-filling process affected by processing parameters[J].Acta Materiae Compo-sitae Sinica,2004,21(6):70-74. |
| [6] | 陈萍,李宏运,陈祥宝.铺层方式对织物渗透率的影响[J].复合材料学报,2001,18(1):30-33.Chen Ping,Li Hongyun,Chen Xiangbao.Effect of layers on permeability[J].Acta Materiae Compositae Sinica,2001,18(1):30-33. |
| [7] | 陈鹏,段跃新,梁志勇.预成型体纵向渗透率统计模型[J].复合材料学报,2004,21(2):105-110.Chen Peng,Duan Yuexin,Liang Zhiyong.Research on the statistical model for the longitudinal permeability of preform[J].Acta Materiae Compositae Sinica,2004,21(2):105-110. |
| [8] | Carter E J,Fell A W,Griffin P R,Summerscales J.Data validation procedures for the automated determination of the two-dimensional permeability tensor of a fabric reinforcement[J].Composites Part A,1996,27A:255-261. |
| [9] | Parnas R S,Howard J G.Permeability characterization,Part Ⅰ:A proposed standard reference fabric for permeability[J].Polymer Composites,1995,16(6):429-445. |
| [10] | Parnas R S,Salme A J.A comparison of unidirectional and radial in-plane flow of fluids through woven composite reinforcement[J].Polymer Composites,1993,14(5):383-394. |
| [11] | Lundstrom T S,Stenberg R.In-plane permeability measurements:A nordic round-robin study[J].Composites Part A,2000,31A:29-43. |
| [12] | Chan A W,Hwang S T.Anisotropic in-plane permeability of fabric media[J].Polymer Engineering and Science,1991,31(16):1233-1239. |
| [13] | Scheidegger A E.The physics of flow through porous media[M].Toronto:University of Toronto Press,1974:68-69. |
| [14] | Hirt D E,Adams K L,Prudhomme R K,et al.In-plane radial fluid flow characterization of fibrous materials[J].Journal of Thermal Insulation,1987,10:153-172. |
| [15] | Adams K L,Rebenfeld L.In-plane flow of fluid in fabrics:Structure/flow characterization[J].Textile Research Journal,1987,57(11):647-654. |
| [16] | Adams K L,Russel W B,Rebenfeld L.Radial penetration of a viscous liquid into a planar anisotropic porous medium[J].International Journal of Multiphase Flow,1988,14(2):203-215. |
| [17] | Weitzenbock J R,Shenoi R A,Wilson P A.Radial flow permeability measurement,Part B:Application[J].Composites Part A,1999,30A:797-813. |
| [18] | 薛定谔 A E,王鸿勋,张朝琛.多孔介质中的渗流物理[M].北京:石油工业出版社,1984:141. |
| [19] | 陈利,李嘉禄,李学明.三维编织中纱线的运动规律分析[J].复合材料学报,2002,19(2):71-74.Chen Li,Li Jialu,Li Xueming.Analysis of the yarn movement in 3D braids[J].Acta Materiae Compositae Sinica,2002,19(2):71-74. |
| [20] | Weitzenbock J R,Shenoi R A,Wilson P A.Radial flow permeability measurement,Part A:Theory[J].Composites Part A,1999,30A:781-796. |
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