基于Prepreg-RTM联合固化工艺的高曲性能复合螺栓T接头的新型制备方法
Tao Zhang1,2, Zhitao Luo3, Jinxin Deng3
1School of Materials Science and Engineering, Beihang University, Beijing 100191, China.
Polymers
|May 11, 2024
概括
一个新的共固化树脂系统使得先进的聚合物复合材料螺栓T关节成为可能. 与传统设计和合金相比,这些新的接头具有显著提高的刚性和强度.
科学领域:
- 材料科学 材料科学 材料科学
- 复合材料工程 复合材料工程
- 机械工程 机械工程
背景情况:
- 开发先进的复合结构需要创新的连接技术.
- 螺栓T关节是各种工程应用中的关键组件.
- 复合T关节的现有方法在性能和制造方面存在局限性.
研究的目的:
- 开发一种新型的聚合物复合物螺栓T关节,采用先树脂转移成型 (RTM) 联合固化工艺.
- 为了评估与传统设计和合金对应物相比,新型T接头的曲性能.
- 描述开发的T关节的机械性能和故障机制.
主要方法:
- 制定了一个由9368环氧树脂 (prepreg) 和6808环氧树脂 (RTM) 组成的共固化树脂系统.
- 使用prepreg-RTM联合固化工艺制造了一种具有内部骨架和外部皮肤的新型螺栓T关节.
- 对新型T关节,传统RTM T关节和2A12合金T关节进行了实验性曲测试.
主要成果:
- 同固化树脂显示出良好的兼容性. 新的T关节表现出了卓越的接口质量,没有缺陷.
- 故障模式包括皮肤骨分离和基板骨折,组件之间负载转移.
- 与传统T关节相比,新型T关节的初始刚度 (1.65x),损伤启动负荷 (5.89x) 和最终负荷 (3.45x) 显著提高.
- 相对于合金T关节,新型T关节的初始刚度是1.44倍,最终负载考虑密度是2.07倍.
结论:
- prepreg-RTM 联合固化工艺对于制造高性能聚合物复合材料螺栓式 T 接头是有效的.
- 新的T接头设计在机械性能方面比传统的复合材料和合金接头大大改进.
- 该研究强调了这种新型接头对于要求高强度与重量比的结构应用的潜力.
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