| Popis: |
At the producing of high loaded composite structures by the autoclave or closed mould processes a curing schedule includes a pre-warming to the resin viscosity reaches a minimum, further applying of pressure, and finally consolidation of resin at elevated temperature to its full polymerization. To ensure the uniformly state of the composites across the thick-walled products, we propose a mathematical model for curing an epoxy-based composite structure with varied thickness. The PDE system linking a kinetic equation with heat transfer equation which takes into account an exothermic heat, a phase transition of resin from liquid to gel and further to the solid state, well describes the cure process which is controlled by independent heat sources. To synthesize the multi-objective optimal control law, we perform the transient analysis of the developed model using the Pareto points in the 8-dimensional space of design variables. |
