热压辅助预成型的超大厚度制件VARI成型工艺研究

HOT-PROCESSING ASSISTED PREFORM TECHNOLOGY FOR SUPER-THICK COMPOSITE LAMINATE BY VARI PROCESS

以VARI工艺为代表的复合材料低成本液体成型技术愈发受到研究关注。针对超大厚度制件的VARI成型,创造性地引入热压辅助预成型技术,以100层的超大厚度层板的VARI成型为例,在制备预成型体的过程中,采用热压辅助预成型,并分析热压辅助预成型引入后,预成型体的厚度变化、进出胶口设置方式以及对最终制件质量的影响。该研究对于提升VARI工艺制件纤维体积含量和制件性能,进一步拓展VARI工艺在民机结构中的应用都具有积极意义,研究结果可以为VARI成型工艺制备的大厚度制件在飞机结构中的设计与应用提供参考。

Represented by VARI process, the liquid composite molding technology has caused more and more research attention. This article focused on the VARI technology for super-thick composite part and creatively put for- ward the hot-pressing assisted preform technology. We took 100-layer super-thick laminate by VARI process for example, introduced hot-pressing in the preform manufacture process, and investigated its influence on the thickness of the preform, the resin injection and outlet placement and the quality of the cured composite part. Our work has positive significance for improving the fiber volume content, the performance of the VARI composite parts and the development of the application of VARI technology in aircraft structure. The results will provide reference for the design and application of thick composite parts by VARI manufacture process in aircraft structure.