INFLUENCE OF RADIUS FILLER FILLING AMOUNT ON QUALITY OF T-SHAPED STIFFENERS

Abstract

Abstract: Stiffened structure is widely used in large composite loading-carrying structure. Radius filler must be used as a kind of filling material in triangle gap of these structures. The filling effect of radius filler can significantly affect the quality of cured structure. To optimize filling amount formula of radius filler and improve the quality of loading-carrying structure, different filling volume of radius filler were filled in three kind of radius of concave corner of T-shaped stiffeners. To investigate the filling volume of radius filler on quality of R region of T-shaped stiffeners, the microstructure of R region were characterized by optical digital microscope. The results show that when the volume of radius filler is far less than the theory filling volume, disperse pores will be easily produced in the interface of radius filler and web plate, and delamination will happen in the interface of skin and radius filler. When the volume of radius filler is larger than the theoretical filling volume, delamination and pores will be significantly improved, but the huge volume of radius filler can cause fiber fold and sinking in the skin. According to the experimental results, the correction coefficient of filling amount is 0.9. Finally, the filling formula of radius filler is determined as V= 0.9(R+nh)2(2-π/2)L.

Key words: composite, radius filler, filling amount, T-shaped stiffeners, quality

CLC Number:

TB332

ZOU Jing, ZHAN Li-hua, ZHANG Yong-an, ZENG Li-ran. INFLUENCE OF RADIUS FILLER FILLING AMOUNT ON QUALITY OF T-SHAPED STIFFENERS[J]. Fiber Reinforced Plastics/Composites, 2017, 0(3): 70-75.

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