国产T800级高韧性环氧树脂基复合材料C梁热隔膜预成型工艺研究

摘要/Abstract

摘要： 富含热塑性增韧剂的AC531树脂在国产T800级复合材料的固化过程中,由于增强纤维的存在,热塑性增韧剂在环氧树脂基体中的溶解-分相行为过程与环氧树脂的固化过程同时发生,宏观上表现为AC531树脂基体的黏温曲线在120 ℃~160 ℃之间存在明显的黏度升高又降低的过程,使得其黏温曲线变得复杂,从而对国产T800级复合材料的成型工艺产生影响。通过不同温度下保温不同时间后,树脂黏度和层间滑移阻力的变化,选择了100 ℃保温(30~40)min作为隔膜成型的条件。在此基础上,制备了缘条无曲率(基本型)和缘条带曲率两种C型翼梁。结果表明,国产T800级具有良好的隔膜成型工艺性,能够用来制备C型翼梁,但是对于缘条带曲率的C型翼梁,由于其几何形状的不可展性,在缘条R区和曲面形成的双曲界面处产生了明显的褶皱现象。

关键词: 国产T800级高韧性环氧预浸料, 复合材料, 热隔膜成型工艺, C型翼梁

Abstract: During the curing process of AC531 resin rich in thermoplastic toughening agent in domestic T800 composite, due to the existence of reinforcement fiber, the dissolution phase separation behavior of thermoplastic toughening agent in epoxy resin matrix occurs simultaneously with the curing process of epoxy resin. Macroscopically, the viscosity temperature curve of AC531 resin matrix becomes complex because of the obvious process of increasing and decreasing viscosity between 120 ℃~160 ℃, which will inevitably affect the molding process of domestic T800 composite. According to the change of resin viscosity and slip resistance after holding at different temperature and time, 100 ℃ for (30~40) min was selected as the molding condition. On this basis, two kinds of C-shaped spars with no curvature (basic type) and strip curvature are prepared. The results show that T800 made in China has good membrane forming technology and can be used to prepare C-wing beam. However, for C-type wing beam with curvature of edge strip, due to its undevelopable geometry, obvious fold phenomenon occurs at the hyperbolic interface formed by the R-zone of the flange and the curved surface.

Key words: domestic T800 high toughness epoxy prepreg, composites, hot diaphragm performing process, C-shape wing beam

中图分类号:

TB332

蒋诗才, 安学锋, 闫丽, 崔敬程. 国产T800级高韧性环氧树脂基复合材料C梁热隔膜预成型工艺研究[J]. 复合材料科学与工程, 2020, 0(12): 109-114.

JIANG Shi-cai, AN Xue-feng, YAN Li, CUI Jing-cheng. STUDY ON PREFORM TECHNOLOGY OF C-BEAM HOT DIAPHRAGM OF DOMESTIC T800 HIGH TOUGHNESS EPOXY RESIN MATRIX COMPOSITE[J]. COMPOSITES SCIENCE AND ENGINEERING, 2020, 0(12): 109-114.

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