复合材料T型长桁模具形式研究

Die form study of composite T-stringer

本文探索了碳纤维增强环氧树脂体系复合材料T型长桁的成型模具形式。通过对零件厚度、外形质量的表征,探索了正T及倒T放置两种模具组合形式对T型长桁成型质量的影响。结果表明,正T放置的模具组合形式更有利于提高T型长桁的厚度均匀性,而倒T放置模具组合形式制造的T型长桁的回弹和扭转变形程度更小。

In this study, we investigate the die form of the T-stringer based on the carbon fiber reinforced epoxy resin composite material. Two kinds of T-stringers are fabricated by employing the positive and inverted T-shaped die combination form, respectively. The thickness and shape quality of the different T-stringers are investigated through the direct measurements on the parts and careful data analyses. It is revealed that the T-stringers prepared using the positive T-shaped die combination form generally show more uniform thicknesses along both the cross-sectional and the lengthwise directions. The better thickness uniformity is attributed to the intimate contact between the part and the positive T-shaped die combination form. On the other hand, the inverted T-shaped die combination form provides T-shaped truss with lower degrees of springback and torsion deformation, mainly derived from the uniform temperature distribution across the parts during fabrication. The current study emphasizes the importance of the die combination form selection for the preparation of high quality T-stringers.