工型加筋结构模具方案对共固化过程树脂压力及成型质量的影响

玻璃钢/复合材料 ›› 2018, Vol. 0 ›› Issue (7): 74-81.

工型加筋结构模具方案对共固化过程树脂压力及成型质量的影响

李博¹, 张尉博², 文友谊¹, 马开维¹

1.成都飞机工业集团有限责任公司,成都610092;
2.北京航空航天大学材料科学与工程学院,北京100191

收稿日期:2018-01-08 出版日期:2018-07-25 发布日期:2018-07-20
通讯作者: 顾轶卓(1979-),男,工学博士,副教授,研究方向为先进复合材料制造质量控制理论与技术、纤维与树脂匹配及高性能树脂基体、纳米复合材料、特种功能复合材料,benniegu@buaa.edu.cn。
作者简介:李博(1988-),男,硕士,工程师,主要从事树脂基复合材料成型工艺方面的研究。
基金资助:
国家商用飞机制造工程技术研究中心创新基金(COMAC-SFGS-2016-33198)

INFLUENCES OF MOLD SCHEME ON RESIN PRESSURE AND PROCESSING QUALITY OF CO-CURED I-STIFFENED SKIN

LI Bo¹, ZHANG Wei-bo², WEN You-yi¹, MA Kai-wei¹

1.Chengdu Aircraft Industrial Group Co., Ltd., Chengdu 610092, China;
2.School of Materials Science and Engineering, Beihang University, Beijing 100191, China

Received:2018-01-08 Online:2018-07-25 Published:2018-07-20

摘要/Abstract

摘要： 以碳纤维/双马树脂复合材料工型加筋结构为研究对象,研究了模具方案对热压罐共固化过程树脂压力及成型质量的影响。对筋条两侧的模具采用了三种方案,即铝模/铝模、橡胶软模/铝模、拐角区预浸料增强橡胶软模/铝模。采用自主建立的树脂压力在线监测系统对三种模具方案下工型加筋结构内部树脂压力分布进行研究,进而结合制件尺寸及内部缺陷情况,分析模具方案对树脂流动、模具与预浸料铺层贴合程度及密实过程的影响。结果表明:橡胶软模能显著提高模具与预浸料的贴合程度,从而提高压力传递效率和密实程度;软模拐角区刚度对制件成型质量影响显著,拐角区刚度过低则成型中模具发生较大形变,不利于另一侧铝模与预浸料贴合以及制件尺寸精度的保证;适当提高软模拐角区刚度可提高密实压力均匀性和制件成型质量;适当刚度的橡胶软模和金属刚模配合方案对于加筋壁板结构的共固化工艺较为适用。

关键词: 碳纤维复合材料, 加筋壁板结构, 热压罐工艺, 共固化, 树脂压力

Abstract: In this paper, the influences of mold scheme on resin pressure distribution and processing quality of carbon fiber/bismaleimide resin I-stiffened skin fabricated by autoclave co-cured process were studied. Three kinds of mold schemes for two sides of stiffener were designed, including aluminum mold/aluminum mold, rubber mold/aluminum mold and rubber mold with corner reinforced by prepreg/aluminum mold. And resin pressure distribution inside I-stiffened skin processed with these three mold schemes was investigated by means of self-developed resin pressure online monitoring system. Furthermore, considering dimension and inner defects of I-stiffened skin, the influences of mold scheme on resin flow, fitting state between mold and prepreg stack and compaction process of prepreg stack were studied. The results show that rubber mold significantly improves fitting degree between mold and prepreg stack, thus increasing pressure transferring efficiency of mold and compaction degree of composite. The stiffness of the corner in rubber mold has a significant impact on processing quality of I-stiffened skin. Too low corner stiffness results in larger deformation of mold during processing, which is detrimental to fitting degree between aluminum mold placed at the other side and prepreg stack. It also leads to decrease in dimensional accuracy of I-stiffened skin. Nevertheless, appropriately increasing the corner stiffness of rubber mold can improve uniformity of compaction pressure and processing quality. The mold scheme, which uses rubber mold with reasonable stiffness and metal mold, is suitable for fabricating stiffened skin structure using autoclave co-cured process.

Key words: carbon fiber reinforced composite, stiffened-skin structure, autoclave process, co-cured, resin pressure

中图分类号:

TB332

李博, 张尉博, 文友谊, 马开维. 工型加筋结构模具方案对共固化过程树脂压力及成型质量的影响[J]. 玻璃钢/复合材料, 2018, 0(7): 74-81.

LI Bo,ZHANG Wei-bo,WEN You-yi,MA Kai-wei. INFLUENCES OF MOLD SCHEME ON RESIN PRESSURE AND PROCESSING QUALITY OF CO-CURED I-STIFFENED SKIN[J]. Fiber Reinforced Plastics/Composites, 2018, 0(7): 74-81.

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