A numerical simulation of resin film infusion process for carbon fabric/modified bismaleimide composite
-
摘要: 通过在改性双马来酰亚胺树脂中添加热塑性酚酞聚芳醚砜(PES), 制备了在室温下具有良好成膜性的改性双马来酰亚胺树脂膜。改性双马来酰亚胺树脂的差示扫描量热 (DSC)、凝胶时间、动态和恒温黏度研究表明, 该树脂膜在初始反应温度130 ℃时, 改性双马来酰亚胺的黏度为139.3 mPa·s, 黏度≤1000 mPa·s和黏度≤3000 mPa·s的保持时间分别为98 min和117 min, 有利于RFI成型工艺对增强体的熔渗。采用控制体/有限元法对带十字加强筋形式的复合材料制件进行了RFI成型工艺的数值模拟, 预测了在130 ℃和-0.1 MPa条件下, 浸渍高度与时间的关系以及压力分布, 并预测了浸渍高度极限值。成功制备了曲面带十字加强筋的碳纤维/改性双马来酰亚胺复合材料制件, 经A扫描和C扫描, 未发现明显缺陷。Abstract: A modified bismaleimide resin film with a good film-formability was fabricated by adding thermoplastic polyether sulphone (PES). The DSC, gel time, dynamic viscosity and viscosity at certain temperature were measured. The film has a low viscosity at 130 ℃ (139.3 mPa·s), and the retention time for viscosity less than 1000 mPa·s and 3000 mPa·s at 130 ℃ are 98 min and 117 min, respectively, which makes the resin easily impregnate the fiber perform thoroughly in resin film infusion (RFI) process. A numerical simulation of RFI for composite unit with crossed stiffener was analyzed by control volume/finite element method. The change of infusion height with time, the pressure distribution and the limit infusion height at 130 ℃ and -0.1 MPa were predicted. The arbon fiber/madiied bismaleimide composite with crossed stiffener was successfully prepared, in which no obvious defects were observed by A and C scan.
-
Key words:
- resin film infusion (RFI) /
- numerical simulation /
- modified bismaleimide /
- composite /
- viscosity
-
点击查看大图
计量
- 文章访问数: 1231
- PDF下载量: 987
- 被引次数: 0
下载:
