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
       

Normalized amplitude of a m ( θ ) U ( 2 ω , m ) ( r ) · R 3 / A 1 2 versus e ( Δ e = 0.05 ) at circumferential angle θ = 2.14 rad.