Quantitative damage imaging using Lamb wave diffraction tomography

Zhang Hai-Yan^{1, †,}, Ruan Min¹, Zhu Wen-Fa^{1, 2, ‡,}, Chai Xiao-Dong²

Analytical (red solid curves) and finite element simulation (blue dotted curves) results for circle blind hole damage with radius a = 4 mm and hole depth 2(h − b) = 1.6 mm at frequency-thickness product 400 kHz · mm.