Lamb waves topological imaging combining with Green’s function retrieval theory to detect near filed defects in isotropic plates
Zhang Hui1, Zhang Hai-Yan1, †, Xu Meng-Yun1, Fan Guo-Peng1, Zhu Wen-Fa1, Chai Xiao-Dong2
       

Pulse-echo responses of each element (i = j) for aluminum plate B: (a) directly captured h i , j ( t ) ; (b) reconstructed g i , j ( t ) .