THREE-DIMENSIONAL NUMERICAL SIMULATION ON THE FIBER LENGTH DISTRIBUTION IN INJECTION MOLDING OF LONG FIBER REINFORCED POLYMER

Abstract

Abstract: Based on Phelps-Tucker fiber breakage model, a center-gated disk was used for a three-dimensional numerical simulation during flow in injection molding of long fiber reinforced polymer by using Moldflow. The effects of flow rate, melt temperature, mold temperature and holding pressure on fiber length distribution were investigated, and the mechanisms were discussed. The results show that the longest and shortest fibers coexist near the gate, and the fiber length near the wall is larger than that of central layer. With flow rate, mold temperature and holding pressure increasing, the fiber length increases correspondingly. With the increase of melting temperature, the fiber length decrease first and then increase. Holding pressure near the wall has minimal impact on fiber length. These results from numerical simulation agree well with the corresponding references.

Key words: long fiber reinforced polymer, injection molding, fiber length distribution, influencing factor, three-dimensional numerical simulation

CLC Number:

TB332

JIANG Qing-song,LIU He-sheng. THREE-DIMENSIONAL NUMERICAL SIMULATION ON THE FIBER LENGTH DISTRIBUTION IN INJECTION MOLDING OF LONG FIBER REINFORCED POLYMER[J]. Fiber Reinforced Plastics/Composites, 2016, 0(10): 32-37.

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