Volume 5, Issue 5 (May 2008)
Finite Element Modeling of the Effects of Delamination Damage on the Natural Frequencies of Composite Panels
This paper describes the analysis and experimental effort undertaken to determine damage detection in composite beams. Finite element analysis of delamination and its effect on the natural frequencies of the composite beam is determined using cohesive zone elements of a commercial finite element software material model ANSYS. Numerical simulations are carried out to analyze typical cases of a delaminated composite beam with different boundary conditions. It is found that an increase in the delaminated region ratio increases the percent deviation in the natural system frequencies. The amount of deviation was different for different types of delamination. The frequency charts of the present study may be useful for engineering design and non-destructive testing analysis. It can be used as a tool for diagnosis, detection, and identification of delaminations in engineering applications by monitoring the frequency change.