Vibration Analysis of Delaminated Plates

Abstract

The delamination phenomenon is common in composite beams as the composite beams are having laminate structures. Delamination leads to development of cracks which reduces the strength of the material and ultimately the material fails to bear the desirable load. In this project, the effect of delamination on free vibration of a rectangular plate with through width delamination was investigated using a finite strip method. The basic understanding of the influence of delamination on natural frequencies of delaminated plate is presented using Ansys13.0. Hamilton’s principle is used to derive the equations of motion. In addition other factors affecting the vibration of delaminated plates are discussed. The variables of delamination are:
1. Location of delamination
2. Size of delamination
3. Mode of frequency
The numerical results for free vibration of delaminated plates are presented. As expected, the natural frequency decreases with increase in delamination length. These results obtained from ANSYS 13.0 are compared with the results of other case studies. The simulation and graphs are plotted to correlate the natural frequency and delamination variables.