摘要
针对弯曲流道式浸渍模具,结合雷诺方程和达西定律建立了便于直接使用的解析解形式浸渍模型。数值法计算和浸渍实验结果表明,所建立的浸渍模型能够较为准确地描述浸渍过程。浸渍模型分析结果表明,增加楔形区个数、减小楔形区入口高度、增大楔形区长度、增大纤维束展宽、提高加工温度、降低牵引速度均可以提高浸渍程度。
Aimming at the bending flow channel mold, the Reynolds equation and Darcy's law were combined to establish an impregnation model which is convenient to use directly. The finite difference method calculation and impregnation experiments show that the established impregnation model can describe the impregnation process accurately. The analysis results of the impregnation model indicate that the impregnation degree can be raised through increasing the number of wedge zones, reducing the inlet height of the wedge zone, increasing the length of the wedge zone, increasing the fiber bundle width, increasing the processing temperature and reducing the pulling speed.
引文
[1]鲁佳腾,颜春,徐海兵,等.热塑性碳纤维上浆剂的研究进展[J].玻璃钢/复合材料,2017(6):94-99.
[2]孙银宝,李宏福,张博明.连续纤维增强热塑性复合材料研发与应用进展[J].航空科学技术,2016,27(5):1-7.
[3]Peltonen P,Lahteenkorva K,Paakkonen E J,et al.The influence of melt impregnation parameters on the degree of impregnation of a polypropylene/glass fibre prepreg[J].Journal of Thermoplastic Composite Materials,1992,5(4):318-343.
[4]Gaymans R J,Wevers E.Impregnation of a glass fibre roving with a polypropylene melt in a pin assisted process[J].Composites Part A:Applied Science&Manufacturing,1998,29(5):663-670.
[5]Bates P J,Charrier J M.Effect of process parameters on melt impregnation of glass roving[J].Journal of Thermoplastic Composite Materials,1999,12(4):276-296.
[6]Wang R G,Yang F,Hao L F,et al.Optimizing processing parameters of pin-assisted-melt impregnation of fiberreinforced plastics by numerical simulation[J].Journal of Reinforced Plastics&Composites,2012,31(11):731-737.
[7]Allaire P,Yurko V,Cao J M,et al.Axial flow seal/bearing efficient pressure formulation for a Reynolds equation solution[J].Applied Mechanics&Materials,2014,630:169-180.
[8]Chasalevris A,Sfyris D.Evaluation of the finite journal bearing characteristics,using the exact analytical solution of the Reynolds equation[J].Tribology International,2013,57:216-234.
[9]Dousti S,Allaire P,Dimond T,et al.An extended Reynold equation applicable to high reduced Reynolds number operation of journal bearings[J].Tribology International,2016,102:182-197.
[10]Chao Q,Zhang J,Xu B,et al.Discussion on the Reynolds equation for the slipper bearing modeling in axial piston pumps[J].Tribology International,2018,118:140-147.
[11]Bates P J,Kendall J,Taylor D,et al.Pressure build-up during melt impregnation[J].Composites Science&Technology,2002,62(3):379-384.
[12]Lang O R,Steinhilper W.滑动轴承[M].王成焘,曹永上,译.北京:机械工业出版社,1986:103-111.
[13]Gebart B R.Permeability of unidirectional reinforcements for RTM[J].Journal of Composite Materials,1992,26(8):1 100-1 133.
[14]Xu P,Yu B.Developing a new form of permeability and Kozeny-Carman constant for homogeneous porous media by means of fractal geometry[J].Advances in Water Resources,2008,31(1):74-81.
[15]杨建军.连续纤维增强热塑性复合材料浸渍模拟及优化研究[D].北京:北京化工大学,2016.
[16]Standard test methods for void content of reinforced plastics:ASTM D2734-16[S].West Conshohocken:ASTMInternational,2016.
