碳纤维加筋板的超声相控阵C扫描检测可靠性研究

Reliability of Ultrasonic Phased Array C-scan Testing for Carbon Fiber Composite Stiffened Panels

碳纤维加筋板结构在现代航空器中被大量应用,超声波相控阵C扫描技术是这类结构在役环境下的有效检测手段之一,被广泛应用。对于同一个损伤,在实际检测中会出现从不同的方向检测结果不一致的现象;这种现象在传统单点超声波C扫描检测中是不会发生的。本文从试验件表面曲率、缺陷特性等方面对这种不一致性进行了分析和探讨,并给出了避免这一类不确定性发生的建议。

Carbon fiber composite stiffened panels have been widely used in modern aircraft.Ultrasonic phased array C-scan technology is one of the effective methods for this laminated structure in-service.In practice,results for the same damage of multi-crystal phased array C-scan may be inconsistent with different detecting directions.However,this phenomenon does not occur by the conventional single crystal C-scan testing.This paper analyses these inconsistencies from surface curvature and defect characteristics and presents recommendations to avoid the occurrence of these uncertainties.