复合材料层合板凹坑损伤目视检测影响因素分析

Analysis of Influence Factors on Visual Inspection of Dent Damage in Composite Laminates

飞机复合材料结构设计中必须确定凹坑损伤的目视检测门槛值及其影响因素。采用3种直径的冲头,通过准静态方法对平板表面引入随机分布的凹坑损伤。考察板的角度、颜色以及检测人员水平3种因素对详细目视检测结果的影响。基于累积对数正态分布模型分析对比了不同因素条件下的检出概率。结果表明,蓝色板的凹坑损伤更容易被检出;接近垂直检测角度的板的凹坑损伤更容易被检出;具有维修或目视检测相关经验的专业人员的检出概率高。

The visual inspection threshold of dent damage and its influence factors must be determined during the aircraft composite structure design.Three kinds of punches with different diameters are used to introduce randomly distributed dent damage on the surface of plate by quasi⁃static method.The influence of three factors,such as the angle of the plate,color and the level of the inspector,on the results of the detailed visual inspection is investigated.Based on the cumulative lognormal distribution model,the detection probability of different factors is analyzed and compared.The results show that dent damage of the blue plate is easier to be detected;it is easier to detect the dent damage when the angle is close to the vertical;and the detection probability of the professional with maintenance or visual inspection experience is high.