Effects of Delamination on Guided Waves in a Symmetric Laminated Composite Beam

Table 1

Comparison of the natural frequencies (Hz) obtained by SEM and ANSYS for the composite beam without delamination.

Mode number	1	3	5	10
SEM (4)	21.498	375.43	1204.3	4155.9
ANSYS (140)	21.502	379.98	1353.6	9313.0
ANSYS (560)	21.499	375.60	1206.2	4193.6
ANSYS (3360)	21.499	375.56	1205.5	4168.8

Note: ( ) is the number of degrees of freedom used in the analysis.