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Determination of fundamental frequency and mode shape
High precision plate element has been used to obtain the mode shape and fundamental frequencies for the passive composite plate. The composite plate considered for numerical analysis and the arrangement of elements are shown in Figure 19.1. Other details of laminated composite plates are presented in Table 19.1.
Figure 19.1: Composite laminate and its element configuration
Table 19.1 Numerical details used in the computation
| Composite |
Glass-epoxy |
Stacking sequence |
0/0/0/0 |
Elastic modulus, E1 |
28.45 GPa |
Elastic modulus, E2 |
2.148 GPa |
Shear modulus, G12 |
1.032 GPa |
Poisson’s ratio, ν |
0.21 |
Density, ρ |
1670 kg/m3 |
Thickness of each layer |
0.5mm |
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