关键词: 复合材料, 递归分析, 特征提取, 无损检测, 损伤定位成像

Abstract:  Based on cross-recursion rate， a damage localization imaging method was proposed to address the difficulty in constructing a damage index for composite plates based on Lamb waves. This method firstly described the damage information in each sensing path by cross-recursion rate and constructed a damage index based on the cross-recursion rate. Combined with the elliptical probability imaging algorithm， the method implemented the damage localization detections of composite plates. The results of finite element simulation and fatigue test data analysis show that this method may accurately locate the internal damages of composite plates and identify the damage location even in the presence of noise interference.

Key words: composite material, recurrence analysis, feature extraction, non-destructive testing, damage localization imaging