Response features of nonlinear circumferential guided wave on early damage in inner layer of a composite circular tube
Li Ming-Liang1, Liu Liang-Bing1, Gao Guang-Jian1, Deng Ming-Xi1, †, Hu Ning1, Xiang Yan-Xun2, ‡, Zhu Wu-Jun2
       

Time-domain signals of primary CGWs at arc length (a) L1 = 230.8 mm and (b) L2 = 292.1 mm.