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Abstract

The aeroelastic characteristics of a cantilevered composite panel of large aspect ratio and with an edge crack are investigated. The panel consists of several fiber-reinforced composite plies, and is modeled with a one-dimensional beam vibrating in coupled bending and torsion. The fundamental mode shapes of the cracked cantilever are used to study the interaction between a crack and aerodynamic characteristics by employing Galerkin’s method. Variation of the divergence/flutter speed with respect to the crack ratio, its location as well as the fiber angle is investigated. The divergence/flutter speed is more sensitive to the bending-torsion coupling parameter than to the presence of the crack. The crack may or may not reduce the divergence/flutter speed, depending on the fiber orientation. The qualitative analysis may help the development of an online prognosis tool for an aircraft with large aspect-ratio unswept composite wings.

Keywords

crack composite panel flutter divergence

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References

Weisshaar, T.A. (1985). Vibration tailoring of advanced composite lifting surfaces . Journal of Aircraft, 22(2), 141-147 .

Chen, W.-H. and Lin, H.-C. (1985). Flutter analysis of thin cracked panels using the finite element method . AIAA Journal, 23(5), 795-801 .

Lin, K.-J. , Lu, P.-J. and Tarn, J.-Q. (1991). Flutter analysis of anisotropic panels with patched cracks . Journal of Aircraft, 28(12), 899-907 .

Kim, T. , Atluri, S.N. and Loewy, R.G. (1998). Modeling of microcrack damaged composite plates undergoing nonlinear bimodular flutter oscillations . AIAA Journal, 36(4), 598-606 .

Pidaparti, R.M.V. (1997). Free vibration and flutter of damaged composite panels . Composite Structures, 38(1-4), 477-481 .

Strganac, T.W. and Kim, Y.I. (1996). Aeroelastic behavior of composite plates subject to damage growth . Journal of Aircraft, 33(1), 68-73 .

Wang, Q. and Koh, C.G. (2003). Region of flutter and buckling instability for a cracked beam . AIAA Journal, 41(11), 2302-2304 .

Wang, K. , Inman, D.J. and Farrar, C.R. (2005). Modeling and analysis of a cracked composite cantilever beam vibrating in coupled bending and torsion . Journal of Sound and Vibration, 284(1-2), 23-49 .

Banerjee, J.R. (2001). Explicit analytical expressions for frequency equation and mode shapes of composite beam . International Journal of Solids and Structures, 38(14), 2415-2426 .

10.

Fung, Y.C. (1969). The Theory of Aeroelasticity, New York: Dover Publications, Inc.

11.

Krawczuk, M. and Ostachowicz, W.M. (1995). Modeling and vibration analysis of a cantilever composite beam with a transverse open crack . Journal of Sound and Vibration, 183(1), 69-89 .

12.

Song, O. , Ha, T. and Librescu, L. (2003). Dynamics of anisotropic composite cantilevers weakened by multiple transverse open cracks . Engineering Fracture Mechanics, 70(1), 105-123 .

13.

Nikpour, K. and Dimarogonas, A.D. (1988). Local compliance of composite cracked bodies . Composites Science and Technology, 32(3), 209-223 .

14.

Lin, K.-J. , Lu, P.-J. and Tarn, J.-Q. (1989). Flutter analysis of cantilever composite plates in subsonic flow . AIAA Journal, 27(8), 1102-1109 .

Crack-induced Changes in Divergence and Flutter of Cantilevered Composite Panels

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