Vibration-Based, Nondestructive Methodology for Detecting Multiple Cracks in Bending-Torsion Coupled Laminated Composite Beams

Table 2

Frequency data collected for an intact and multicracked Euler–Bernoulli [1386] laminated composite beam.

	Mode 1	Mode 2	Mode 3	Mode 4	Mode 5
(Hz)	6.82	42.72	71.40	119.59	214.22
(Hz)	5.65	29.88	67.62	69.87	176.40
Measured error (%)	2.8	2.8	3	2	2.3
with error (Hz)	5.81	30.72	69.65	71.27	180.46