From: Transient bending analysis of a functionally graded circular plate with integrated surface piezoelectric layers
Thickness ratio
First mode
Second mode
Third mode
1/12
68.65
417.62
1,026.62
1/10
69.52
418.99
1,029.74
1/8
71.52
420.96
1,034.82
1/5
73.68
428.44
1,052.90