VARI工艺中纤维体积含量的影响因素及控制技术研究

INFLUENCE AND CONTROL OF PARAMETERS ON THE COMPOSITE FIBER VOLUME FRACTION BY VARI PROCESS

分别采用了不同预定型参数和注射工艺参数成型了VARI工艺平板,并研究了各个工艺参数对复合材料平板厚度(纤维体积含量)的影响规律。研究结果表明,适当增加树脂过注和过抽时间,提高纤维预定型压力,并降低树脂注射粘度,可增加纤维的重排时间,减少树脂对真空成型压力抵消,从而提高纤维的排列密实程度,达到提高平板纤维体积含量的效果。采用VARI工艺成型的复合材料平板纤维体积含量最高可至57.1%。

The composite laminates were manufactured by VARI technology with different preform and infusion parameters,and the effect of the technology parameters to the fiber volume fraction are investigated. The results show that the fiber volume fraction of the composite laminate can be improved through the way of increasing resin over infusion and over vent time,decreasing the resin viscosity or increasing the preform pressure. With the above methods,the fiber can be re-configurated for longer time so that the fiber can be compacted more deeply. The fiber volume fraction can reach to 57.1% for the compacted laminate by VARI manufactuing process.