复合材料管道连接件真空辅助成型工艺树脂流动研究

对采用真空辅助树脂传递模塑成型工艺(VARTM)制造复合材料管道连接件的树脂流动过程进行分析,考虑树脂注模工况下的注射口和出射口位置,采用有限元/控制体积方法分别模拟了4种可能树脂注模方式所需工艺时间和树脂流动前锋形状,并确定了合适的注模方式。模拟结果表明:与点注射的树脂注模方式相比,线注射方式可以得到更均匀的树脂流动前锋;进而采用线注射-线出射树脂注模方式能够有效浸润织物。采用模拟所得注模方式开展了VARTM工艺试验,制造了复合材料管道连接件缩比件和整体连接件筒构件,所得试验结果与数值模拟结果一致,验证了模拟结果的可靠性。

Research on the Resin Flow Process of the Composite Pipe Key-Part in Vacuum Assisted Resin Transfer Molding

The composite pipe key-part in vacuum assisted resin transfer molding (VARTM) process was studied, in which the resin flow processes of four possible resin injection methods were simulated with the finite element/control volume method and the locations of inlet-gates and outlet-vents were estimated by comparing the needed injection time and resin flow front shapes. Following results can be obtained from the simulation process: the line-injection method can ob-tain a much better resin flow front shape as comparing with the point-injection method, which is the very reason of choos-ing the line-injection method to obtain the composite pipe scaled-down and whole scale key-parts. The actual experiments to validate the simulation results were conducted with the testing result that was implemented on the scale-down and whole-scale composite pipe structure using the determined resin injection method. The simulation results show good agreement with that of the tests.