复合材料帽型结构热压共固化成型质量研究

Forming Quality of Composite Hat-stiffened Structure by Autoclave Co-curing Process

在共固化工艺条件下,采用不同结构芯模制备了复合材料帽型加筋构件。基于超声相控阵无损检测技术,分别开展了帽型结构不同部位成型质量检测与分析。针对帽型构件帽顶处的表面形状利用相控阵B扫进行了表征;通过闸门定位技术检测了帽边成型精度;查明了帽型结构卧边和蒙皮结合界面质量与超声衰减系数间的关联规律,提出了利用超声衰减系数表征共固化成型界面质量的量化模型。同时,在无损检测基础上,结合显微金相分析,对超声相控阵检测结果从微观的角度进行了验证,最终确定Φ12mm孔硅橡胶芯模为该工艺条件下的最佳芯模结构。

Composite hat-stiffened structures were fabricated using different mandrels under the co-curing process. Based on the ultrasonic phased array nondestructive testing technology,the inspection and analysis of forming quality at different positions of the hat-stiffened structure were carried out. The geometrical shape of the hat-stiffened structure located in the crown was characterized using phased array B-scan; the forming precision of web was measured by the gate location technology; and the specific quantitative relationship between the interface bonding quality of the flange with the skins and ultrasonic coefficient was found. Meanwhile,combined with microscopic metallographic analysis,the ultrasonic phased array testing result is verified from the view of microcosmic,and the optimal mandrel structure with Φ12mm was ultimately confirmed under certain co-curing process.