Cure Simulation of Thick Composite Structures Using the Finite Element Method

Abstract

A finite element code is developed for the two-dimensional cure simulation of thick composite structures. In contrast to one or two-dimensional codes based on the finite difference method, the present finite element method can easily model composite structures with arbitrary shapes including the mandrel used for the cure set-up. For the two-dimensional cure simulation, a degeneration method to build the thermal conductivity matrix is proposed. The present finite element method is verified by two numerical examples. The numerical results show good agreement with the measured data appeared in the literatures. However, a full three-dimensional cure simulation is needed for more accurate cure simulation.

Keywords

cure simulation finite element method thick composite structures

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References

1. Garala, H.J. , “Structural Evaluation of 8-in. Diameter Graphite-Epoxy Composite Cylinders Subjected to External Hydrostatic Compressive Loading”, DTRC-89/016 David Taylor Research Center, 9/1989.

2. Telgadas, H.K. and Hyer, M.W. , “The Influence of Layer Waviness on the Stress State in Hydrostatically Loaded Cylinders: Further Results,” Journal of Composite Materials, Vol. 9, 9/1990, pp. 503–518.

3. Lee, S.T. and Springer, G.S. , “Filament Winding Cylinders: I. Process Model,” Journal of Composite Materials, Vol. 24, 12/1990.

4. Calius, E.P. , Lee, S.Y. and Springer, G.S. , “Filament Winding Cylinders: II. Validation of the Process Model,” Journal of Composite Materials, Vol. 24, 12/1990.

5. Lee, S.Y. and Springer, G.S. , “Filament Winding Cylinders: III. Selection of the Process Variables,” Journal of Composite Materials, Vol. 24, 12/1990.

6. Bogetti, T.A. and Gillespie, J.W., Jr. , “Two-Dimensional Cure Simulation of Thick Thermosetting Composites,” Journal of Composite Materials, Vol. 25, 1991, pp. 239–273.

7. White, S.R. and Hahn, H.T. , “Cure Cycle Optimization for the Reduction of Processing-Induced Residual Stresses in Composite Materials,” Journal of Composite Materials, Vol. 27, No. 14, 1993.

8. Ciriscioli, P.R. , Springer, G.S. and Lee, W.I. , “An Expert System for Autoclave Curing of Composites,” Journal of Composite Materials, Vol. 25, 12/1991.

9. Kim, C. , Teng, H. , Tucker, C.L. and White, C.R. , “The Continuous Curing Process for Thermoset Polymer Composites. Part 1: Modeling and Demonstration,” Journal of Composite Materials, Vol. 29, No. 9, 1995.

10.

10. Zienkiewicz, O.C. and Taylor, R.L. , The Finite Element Method, 4th edition, McGraw-Hill, 1989.