针对飞行器复合材料常用加筋板结构, 采用胶接共固化整体工艺成型T形加筋板. 采用自行建立的压力测试方法测试了T形加筋板在热压罐成型过程的压力分布, 通过吸胶量、筋条厚度的检测, 分析了树脂在筋条内的流动形式, 研究了树脂流动的影响因素及影响规律. 结果表明: 筋条不同部位明显存在压力分布不均, 在压力差作用下树脂发生明显的面内流动, 易产生富脂、厚度不均等缺陷, 导致筋条拐角较厚, 约是突缘和腹板厚度的1.1～1.4倍, 模具组合方案、曲率半径、填充料含量明显影响树脂面内流动和纤维密实程度.
T-stiffened skins widely used in aircraft industry nowadays were fabricated by integral molding technology of CO-bonding in autoclave. A method of self-designed solid pressure testing was introduced to measure the pressure distribution in the T-stiffeners during fabrication. The resin flow and fiber compaction of T-stiffened skins were investigated by analyzing the bleeding quantity and stiffener thickness. The results indicate that the presence of significant resin flow in plane is induced by pressure difference distributing in the various zones of the stiffeners, which resuIts in some nlanufacturing defects of rich resin and non-uniform thickness in the comer section of stiffeners. The ratios of the thickness of the comer to the web and to the flange are almost in the range of 1. 1～1. 4. Moreover, the resinflow and fiber compaction are remarkably influenced by tool assembly schemes, curvature radii and fillers.
参考文献
| [1] | Loos A C,Springer G S.Curing of epoxy matrix composites[J].Journal of Composite Materials,1983,17:135-169. |
| [2] | Gutowski T G,Morigaki T C.The consolidation of laminatecomposites[J].Journal of Composite Materials,1987,21:172-188. |
| [3] | Dave R,Kardos J L,Dudukovic M P.A model for resin flow during composite processing I:General mathematical development[J].Polymer Composites,1987.8(1):29-38. |
| [4] | Dave R.A unified approach to modeling resin flow during composite processing[J].Journal of Composite Materials,1990,24(1):22-41. |
| [5] | 任骞,扎姆阿茹娜,张佐光.热压成型工艺单向铺层纤维密实状态研究[J].玻璃钢/复合材料,2004,31(4):20-23.Ren Q Jan,Zhamu Aruna,Zhang Zuoguang.Study on compaction of aligned fiber hot pressing process[J].Fiber Reinforced Plastics/Composites,2004,31(4):20-23. |
| [6] | 龚颖,张佐光,顺轶卓,等.热压工艺参数对单向复合材料层板密实状态的影响[J].复合材料学报,2006,23(1):12-16.Gong Ying,Zhang Zuoguang,Gu Yizhuo,et al.Effects of hot pressing process on fiber compaction of unidirectional composite laminates[J].Acta Materiae Compositae Siniea,2006,23(1):12-16. |
| [7] | 赵渠森.复合材料手册[M].北京:机械工业出版社,2003:1242-1243. |
| [8] | Charlotte M.Emile G,Brian G F.Stiffener debonding mechanisms in post-buckling CFRP aerospace panels[J].Composites Part A:Applied science and manufacturing,2005,36(7):934-946. |
| [9] | Vijayaraju K,Mangalgiri P D,Dattaguru B.Experimental study of failure and failure progression in T-stiffened skins[J].Composite Structures,2004.64(2):227-234. |
| [10] | Huang C K.Study on co-cured composite panels with blade-shaped stiffeners[J].Composites Part A:Applied Science and Manufactu ring,2003,34(5):403-410. |
| [11] | Yang Q D,Rugg K L,Cox B N,Shaw M C.Failure in the junction region of T-stiffeners:3D-braided vs 2D tape laminate stiffeners[J].International Journal of Solids and Structures,2003,40:1653-1668. |
| [12] | 李艳霞.先进复合材料热压流动/压缩行为数值模拟与工艺质量分析[D].北京:北京航空航天大学,2008. |
| [13] | 张宁,张博明,潘利剑.整体化结构形成软模对压力传递的影响数值分析[J].航空制造技术.2007(增刊):110-113.Zhang Ning,Zhang Boming,Pan Lijian.Finite element analysis for effect of flexible die on transmission of pressure to integrated structure[J].Aeronautical Manufacturing Technology,2007(supplement issue):110-113. |
| [14] | 顾轶卓,张佐光,李敏.复合材料热压成型过程的树脂压力测试系统[J].复合材料学报,2007,24(2):23-27.Gu Yizhuo,Zhang Zuoguang,Li Min.Resin pressure measuring system of hot pressing process of composites[J].Acta Materiae Compositae Sinica,2007,24(2):23-27. |
| [15] | Hubert P,Poursartip A.Aspects of the compaction of composite angle laminates:An experimental investigation[J].Journal of Composite Materials,2001,35(1):2-26. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%