Curing simulation of thermoset composites

Abstract This paper deals with the modelling and simulation of resin flow, heat transfer and the curing of multilayer thermoset composite laminates during processing in an autoclave. Darcy's Law and Stokes’ slow-flow equations are used for the flow model and, for approximately isothermal flows, a similarity solution is developed. This permits the decoupling of the velocity and thermal fields. A two-dimensional convection–diffusion heat equation with an internal heat generation term is then solved numerically, together with the equation for the rate of cure, using a finite difference scheme on a moving grid. The simulations are performed with varying composite thicknesses, and a comparison of numerical results with known experimental data confirms the approximate validity of the model.

[1]  George S. Springer,et al.  Autoclave Curing — Comparisons of Model and Test Results , 1992 .

[2]  S. Yi,et al.  Effects of Thermo-Mechanical Properties of Composites on Viscosity, Temperature and Degree of Cure in Thick Thermosetting Composite Laminates during Curing Process , 1998 .

[3]  Wen-Bin Young,et al.  Compacting pressure and cure cycle for processing of thick composite laminates , 1995 .

[4]  L. Preziosi,et al.  Modelling matrix injection through elastic porous preforms , 1998 .

[5]  A. Haji-Sheikh,et al.  A thermal model for cure of thermoset composites , 1997 .

[6]  S. Peters.  Handbook of Composites , 1998 .

[7]  Sean McKee,et al.  An Alternating Direction Implicit Scheme for Parabolic Equations with Mixed Derivative and Convective Terms , 1996 .

[8]  Wen-Bin Young,et al.  Consolidation and cure simulations for laminated composites , 1996 .

[9]  George S. Springer,et al.  Thermal Conductivities of Unidirectional Materials , 1967 .

[10]  John W. Gillespie,et al.  Two-Dimensional Cure Simulation of Thick Thermosetting Composites , 1991 .

[11]  D. Joseph,et al.  Boundary conditions at a naturally permeable wall , 1967, Journal of Fluid Mechanics.

[12]  Timothy G. Gutowski,et al.  The Consolidation of Laminate Composites , 1987 .

[13]  Dai Gil Lee,et al.  Development of an Autoclave Cure Cycle with Cooling and Reheating Steps for Thick Thermoset Composite Laminates , 1997 .

[14]  J. L. Kardos,et al.  A model for resin flow during composite processing: Part 1—general mathematical development , 1987 .

[15]  G. Springer,et al.  Curing of Epoxy Matrix Composites , 1983 .

[16]  J. Westhuizen,et al.  Development of a numerical code that simulates combined heat transfer, resin flow and compaction during composites processing , 1995 .

[17]  A. Bejan,et al.  Convection in Porous Media , 1992 .

[18]  A cure analysis for axisymmetric composites , 1993 .

[19]  George S. Springer,et al.  Heat of Reaction, Degree of Cure, and Viscosity of Hercules 3501-6 Resin , 1982 .

[20]  Raju Davé,et al.  A Unified Approach to Modeling Resin Flow During Composite Processing , 1990 .

[21]  Wen-Bin Young,et al.  Resin flow analysis in the consolidation of multi-directional laminated composites , 1995 .

[22]  F. Lai,et al.  Autoclave curing of thermosetting composites: process modeling for the cure assembly , 1994 .

[23]  M. Hojjati,et al.  Curing simulation of thick thermosetting composites , 1994 .