Lamb Waves in a Functionally Graded Composite Plate with Nonintegral Power Function Volume Fractions

Table 1

Products of thickness and cutoff frequencies of the Lamb waves propagating in the homogenous plate and the FGM plate (MHz⋅mm).

	Cr	Ceramics	FGM ()	FGM ()	FGM ()	FGM ()
1	11.862	17.289	14.931	14.135	13.708	13.233
2	19.577	30.802	26.013	24.243	23.267	22.195
3	23.723	34.577	29.855	28.287	27.173	26.173
4	35.585	51.866	44.832	42.132	40.675	39.142
5	39.154	61.603	51.988	48.228	46.202	44.071
6	47.447	69.155	59.790	56.154	54.192	52.125