Research Article
A Unified Analysis for the Free Vibration of the Sandwich Piezoelectric Laminated Beam with General Boundary Conditions under the Thermal Environment
Figure 7
Variations of the frequency parameter Ω versus the ply orientation, lamination method, and electric potential for a sandwich laminated beam (PZT-5A/material-D/…/PZT-5A, material-D, E1/E2 = 15, E2 = 109 GPa).
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