Natural vibration frequencies of delaminated composite beams

Marek Krawczuk; Wiesław Ostachowicz; Arkadiusz Żak

Authors

Marek Krawczuk Institute of Fluid Flow Machinery, Polish Academy of Sciences
Poland
Wiesław Ostachowicz Institute of Fluid Flow Machinery, Polish Academy of Sciences
Poland
Arkadiusz Żak Institute of Fluid Flow Machinery, Polish Academy of Sciences
Poland

Abstract

In the presented work a model of a layered, delaminated composite beam based on the finite elements method was introduced. In this model the beam was divided into finite elements, while the delamination was modelled using additional boundary conditions. One delaminated region in the cross-section of the beam was considered which extended to the full width of the beam. It was also assumed that the delamination was open. The influence of the delamination length and position on the changes of natural frequencies of flexural vibrations of the laminated composite cantilever beam were investigated.

References

[1] W.J. Bottega, A. Maewal. Delamination buckling and growth in laminates. Journal of Applied Mechanics, 50: 184- 189, 1983.
[2] H. Chai, C.D. Babcock, W.G. Knauss. One-dimensional modelling of failure in laminated plates by delamination buckling. International Journal of Solids and Structures, 17: 1069- 1083, 1981.
[3] H.P. Chen. Shear deformation theory for compressive delamination buckling and growth. AIAA Journal, 29: 813- 819, 1991.
[4] A.L. Kalamkarov. Composite and reinforced elements of construction. John Willey and Sons, New York, 1992.
[5] W. Ostachowicz, M. Krawczuk. Dynamic analysis of delaminated composite beam. Machine Vibration, 3: 107- 116, 1994.

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Natural vibration frequencies of delaminated composite beams

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