基于NCF技术的RTM成型复合材料T型接头高效制造与验证

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基金项目: 国家973项目(2010CB631101); 国家自然科学基金(E050603); 航空科学基金(20115221003)

Manufacture and testing of composite T-joint fabricated via RTM process based on NCF technology

1.
Science and Technology on Advanced Composites Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095, China;
2.
School of Transportation Science and Engineering, Beihang University, Beijing 100191, China

摘要: 选用多层非屈曲经编织物(NCF)作为增强体, 提高了预成型体的铺覆效率及准确性, 同时根据T型接头的结构特点将其组合成工字梁形式并依此设计成型模具, 采用树脂传递模塑(RTM)成型工艺实现了复合材料T型接头的高效制造, 并对其拉伸和压缩力学性能进行了试验研究。结果表明: T型接头拉伸破坏由孔边蒙皮纤维拉断和腹板分层拉脱造成; 而压缩破坏则由腹板翻边分层屈曲和接头中部蒙皮纤维压断造成; T接头拉伸破坏载荷高于其压缩的破坏载荷。
- 复合材料 /
- T型接头 /
- 非屈曲经编织物(NCF) /
- 树脂传递模塑(RTM)
Abstract: The non-crimp fabrics (NCF) were used as reinforcement to improve the drape efficiency and accuracy. According to the structural characteristics of the T-joint, an I-beam composed of four T-joints was manufactured via resin transfer moulding (RTM) process. The tensile and compressive properties of T-joint were tested. The results show that the tensile failure of T-joint can be reckoned to the fiber broken of skin around the holes and the delamination of web. While the compressive failure is resulted from the buckling of flange and fiber snap of skin at the middle of T-joint. The failure load of T-joint tension is greater than those of compression.
- composites /
- T-joint /
- non-crimp fabric (NCF) /
- resin transfer molding (RTM)