Research Article

Nonlinear Vibrations of 3D Laminated Composite Beams

Figure 4

Main branches of first bending modes of free vibration of composite beams. : amplitude of the first harmonic of the transverse displacement , : amplitude of the first harmonic of the transverse displacement , red: Case  1, black: Case  2, and blue: Case  3.
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892782.fig.004b
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