复合材料C型梁R角褶皱缺陷的形成机理及评价方法研究  

Study on Formation Mechanism and Evaluation Method of R-Angle Fold Defects in Composite C-Beam

作　　者：李紫璇 孙金贵 岳广全 满珈诚 申文轲 林德志 刘卫平 LI Zixuan;SUN Jingui;YUE Guangquan;MAN Jiacheng;SHEN Wenke;LIN Dezhi;LIU Weiping(College of Textiles,Donghua University,Shanghai 201620,China;Center for Civil Aviation Composites,Donghua University,Shanghai 201620,China;College of Materials Science and Engineering,Donghua University,Shanghai 201620,China;COMAC Shanghai Aircraft Manufacturing Co.,Ltd.,Shanghai 201324,China)

机构地区：[1]东华大学纺织学院,上海201620 [2]东华大学民用航空复合材料协同创新中心,上海201620 [3]东华大学材料科学与工程学院,上海201620 [4]中国商飞上海飞机制造有限公司,上海201324

出　　处：《航空制造技术》2025年第1期110-116,共7页Aeronautical Manufacturing Technology

基　　金：国家重点研发计划(2022YFB3704503,2022YFB3709204);宁夏回族自治区重点研发计划(2021BEE02017);上海市科技创新行动计划(20511106902);中央高校基本科研业务费专项。

摘　　要：C型梁R角区域在热压罐成型过程中易产生褶皱缺陷,严重影响构件成型质量和使用性能。为了准确评价褶的皱缺陷程度,提供减少褶皱产生的思路,利用热压罐成型工艺开展了国内外两种不同牌号预浸料在不同铺层数下的C型梁样件制造,对成型过程中R角预浸料的变形行为进行了分析,探究了褶皱缺陷形成的机理。提出了包含厚度分布、边缘滑移角和R角部分褶皱量化分析3个方面的评价方法,并利用该方法对样件进行了评价和对比。结果表明,预浸料的层间滑移行为是褶皱形成机理的关键,滑移阻力过大导致褶皱缺陷的产生;所测试的国产预浸料与国外预浸料相比,其整体黏度更大,所制造的C型梁更易产生褶皱缺陷;3个方面的评价指标具有一致性,可以从多个角度综合衡量C型梁R角的褶皱缺陷程度。The R-angle area of C-beam is prone to fold defects in the process of autoclave forming,which seriously affects the forming quality and service performance of the component.In order to accurately evaluate the degree of fold defects and provide ideas to reduce the generation of folds,C-beam samples of two different brands of prepregs at home and abroad under different layers were manufactured by using autoclaves forming process.The deformation behavior of R-angle prepregs in the forming process was analyzed and the mechanism of fold defects formation was explored.An evaluation method including thickness distribution,edge slip angle and R-angle quantitative analysis of partial folds is proposed,and the samples are evaluated and compared by using this method.The results show that the interlayer slip behavior of prepreg is the key mechanism of fold formation,and excessive slip resistance leads to fold defects.Compared with foreign prepregs,the tested domestic prepregs have greater overall viscosity,and C-beams manufactured are more prone to fold defects.The three evaluation indexes are consistent,and the degree of fold defect at R-angle of C-beam can be measured comprehensively from multiple angles.

关 键 词：热固性复合材料 热压罐成型工艺 C型梁 R角区域 褶皱缺陷 

分 类 号：TB33[一般工业技术—材料科学与工程] V261.97[航空宇航科学与技术—航空宇航制造工程]