高密肋结构整体壁板VARI成型技术研究  

Research on VARI Forming Technology of Integral Wall Panel With Highdensity Rib Structure

作　　者：苏霞 闫超 李祎燊 杨绍昌 程龙 SU Xia;YAN Chao;LI Yishen;YANG Shaochang;CHENG Long(AVIC Aircraft Co.Ltd.,Xi′an 710089;Northwestern Polytechnical University,Xi′an 710072)

机构地区：[1]中航西安飞机工业集团股份有限公司,西安710089 [2]西北工业大学,西安710072

出　　处：《宇航材料工艺》2023年第4期59-64,共6页Aerospace Materials & Technology

摘　　要：高密肋壁板结构可采用真空辅助树脂渗透工艺(VARI)整体一次成型,但成型过程中存在加筋区预定型困难、树脂流动控制复杂等问题,导致制件尺寸精度和孔隙缺陷难以保证。为此,本文根据高密肋壁板多特征区域的特点,采用压实实验和注胶仿真模拟分析方法,优化预定型工艺参数、分区注胶方案。结果表明,选择定型剂浓度4%、温度120℃、压力0.1 MPa、保压时间60 min的压实参数,可有效保证纤维体积分数;采用线注射、线冒口与筋条点冒口结合的分级注胶方案,可实现壁板结构的有效浸润。优化设计的工艺方案与工装成功应用于某型号高密肋整体壁板VARI成型制造,验证了本文分析方法的有效性,研究结果对壁板类结构低成本整体成型技术在军民飞机上的应用与发展具有重要参考价值。The high-density rib structure composite panel could be formed at one time by using the vacuum assisted resin infusion process(VARI).However,there were issues in the molding process,such as the difficulty of preforming the fabrics at rib area and complex resin flow control.So it was difficult to guarantee the dimensional accuracy and internal defects of the part.Based on the structural characteristics of the multi-featured area of the high-density rib structure composite panel,the resin flow simulation and compaction test were implemented to optimize the preforming process parameters and the partitioned resin injection scheme.The results show that the compaction parameters of the agent concentration of 4%,temperature of 120℃,pressure of 0.1 MPa,and holding time of 60 min can effectively ensure the satisfied fiber volume fraction.Adopting a graded glue injection scheme that combines line injection,line riser,and rib point riser can effectively infiltrate the panel structure.The optimized process parameters and the partitioned resin injection scheme are successfully applied to the VARI forming of a high-density rib structure integral panel belonging to an aircraft.The effectiveness of the used analysis method is verified in this paper.The critical reference value for the use and development of low-cost integrated forming technology for rib structure composite panels in military and commercial aircraft is provided.

关 键 词：加筋壁板 整体成形 VARI 

分 类 号：V258.3[一般工业技术—材料科学与工程]