Wang Dengjiang, Zhang Weifang, Wang Xiangyu, Sun Bo
School of Reliability and Systems Engineering, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing 100191, China.
Materials (Basel). 2016 Nov 12;9(11):916. doi: 10.3390/ma9110916.
This study presents a novel monitoring method for hole-edge corrosion damage in plate structures based on Lamb wave tomographic imaging techniques. An experimental procedure with a cross-hole layout using 16 piezoelectric transducers (PZTs) was designed. The A0 mode of the Lamb wave was selected, which is sensitive to thickness-loss damage. The iterative algebraic reconstruction technique (ART) method was used to locate and quantify the corrosion damage at the edge of the hole. Hydrofluoric acid with a concentration of 20% was used to corrode the specimen artificially. To estimate the effectiveness of the proposed method, the real corrosion damage was compared with the predicted corrosion damage based on the tomographic method. The results show that the Lamb-wave-based tomographic method can be used to monitor the hole-edge corrosion damage accurately.
本研究提出了一种基于兰姆波层析成像技术的板结构孔边腐蚀损伤监测新方法。设计了一种使用16个压电换能器（PZT）的交叉孔布局实验程序。选择了对厚度损失损伤敏感的兰姆波A0模式。采用迭代代数重建技术（ART）方法对孔边缘的腐蚀损伤进行定位和量化。使用浓度为20%的氢氟酸对试样进行人工腐蚀。为评估所提方法的有效性，将实际腐蚀损伤与基于层析成像方法预测的腐蚀损伤进行了比较。结果表明，基于兰姆波的层析成像方法可用于准确监测孔边腐蚀损伤。
