STUDY ON PREFORM TECHNOLOGY OF C-BEAM HOT DIAPHRAGM OF DOMESTIC T800 HIGH TOUGHNESS EPOXY RESIN MATRIX COMPOSITE

Abstract

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

CLC Number:

TB332

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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