Table 2:
Comparison of fundamental frequency of cantilever CFRP sandwich beam with multiple debonds.
Debond length (mm)
First mode frequency (Hz)
Spacing
𝑆
(mm)
First mode frequency (Hz)
Analytical*
FEM*
Experiment [
1
]
Analytical*
FEM*
Experiment [
1
]
Nil
183.1
187.89
182.8
—
—
—
—
100
88.93
98.7
82.5
50
73.34
78.65
69
100
—
—
—
150
79.23
84.98
81.9
*Present results.