摘要
对4000余件热压罐阳模成型含曲率复合材料构件的无损检测结果进行统计分析,揭示曲率变化与制造缺陷的关联规律,采用自行设计的固体压力测试方法对刚性阳模/传压型软模阴模界面处的压力分布进行测试,结合拐角区的应力分析及缺陷显微形貌分析制造缺陷的形成机制,并给出避免拐角区制造缺陷的工艺控制措施。结果表明:在热压罐阳模成型过程中,拐角区出现缺陷的比例、分层的程度均随曲率半径的增大而减小;厚度分布呈拐角部分厚,两边平板部分薄的趋势,这与渗流机制与剪切流机制之间的耦合作用及压力分布的均匀性有关。
Defect information obtained by non-destructive identification for more than four thousand composite components fabricated by convex mould in autoclave molding was statistically analyzed in this paper.The correlated rules between curvature radius of composite component and manufacturing defect were revealed.By self-designed solid pressure distribution testing method,the pressure distribution in the interface between flexible mould and rigid convex mould was also measured.Furthermore,combined with stress analysis in corner section and defect micrograph,the forming mechanism of the defect was primarily analyzed.The process control measures to avoid manufacturing defect were given.The results indicate that the defect ratio and the size of delamination in corner section of composite component both decrease with the increase of the curvature radius of component.The thickness distribution tends to be thick in the corner and thin on both sides of flat part,which is related to the coupling action between percolation mechanism and shear flow mechanism and the uniformity of pressure distribution.
作者
王雪明
李韶亮
谢富原
WANG Xueming;LI Shaoliang;XIE Fuyuan(Composite Test Technology Center,AVIC Composite Corporation LTD,Beijing 101300,China;The 6th Military Representative Office of Air Installation in Beijing,Beijing,101300,China;Institute of Industrial and Equipment Technology,Hefei University of Technology,Hefei 230009,China)
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2020年第6期90-96,共7页
Journal of Aeronautical Materials
关键词
层合板
复合材料构件
曲率半径
缺陷
分层
孔隙
laminates
composite components
curvature radius
defect
delamination
void
