On the Finite Element Free Vibration Analysis of Delaminated Layered Beams: A New Assembly Technique

Table 4

The first and second nondimensional frequency parameter (λ) for model 2.

	FEM; 2-node	FEM; 3-node	Analytical (CM) [31]	Ref. [31]	DSM [27]
0.2	4.726	4.725	4.725	4.7	4.725	Mode 1
0.3	4.692	4.695	4.695	4.7	4.695
0.4	4.580	4.578	4.575	4.6	4.575
0.5	4.342	4.338	4.335	4.3	4.335
0.2	7.010	7.002	7.005	7.0	7.005	Mode 2
0.3	6.284	6.281	6.285	6.3	6.285
0.4	5.922	5.917	5.915	5.9	5.915
0.5	5.833	5.820	5.815	5.8	5.815