Non-linear free vibration analysis of composite laminated plates

Abstract EN

Nonlinear free vibration analysis of composite laminated composite thin plate is studied in present work.

Numerical solution using Ansys finite element program (Mechanical APDL 15.0) is used to investigate the effect of strain nonlinearity on the natural frequency of these plates.

Design parameter is changed to investigate their effect on natural frequency of the plate such as lamination, aspect ratio, lamination angle and number of plies.

An experimental work is programed to manufacture and test the mechanical properties and natural frequency of the plate for two boundary conditions (CCCC) and (CFCF) to compare the results with those obtained from numerical analysis.

Numerical results are close to those obtained experimentally; maximum discrepancy is 4.04% for symmetric (CFCF) boundary condition and 5.08 % for an-symmetric (CFCF) boundary condition .