复合材料修理结构的缺陷特征与超声信号

Defect Characteristics and Ultrasonic Signal of Composite Repair Structure

研究了热补仪修理复合材料层压板结构的缺陷特征。金相显微分析结果表明,当修补层数为2层时,样品没有任何缺陷产生;当修补层数增加到4层时,修补层内出现气孔缺陷;当修补层数增加到6层时,除了修补层内出现大量气孔缺陷以外,胶膜层也出现气孔,导致弱粘接/脱粘缺陷的产生。超声检测的结果与金相显微分析一致,很好地再现了上述缺陷。

This paper studies the defect characteristics of composite laminate structure repaired by vulcanizing machine. The results of the metallographic microscopic analysis indicate that the samples have no defects when the repair layers are two layers, while the poros- ity defects appear when the repair layers increase to 4. A large number of porosity defects appear in the repair layers as well as the film layer when the repair layers increase to 6, which result in weak bonding/debonding defects. The ultrasonic testing results are consistent with metallographic microscopic analysis, which reappear above defects very well.