Title: NUMERICAL SIMULATION BASED PROCESS WINDOW FOR CONSOLIDATION OF THERMOSET COMPOSITE LAMINATES
Page Range: p.73-82
Author(s): Min Li; Yizhuo Gu; Yanxia Li; Zuoguang Zhang
File size: 482K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 17
Issue No: No.2
Abstract
Laminate consolidation is very important for continuous fibre-reinforced thermoset resin matrix composites and the degree of consolidation depends on resin rheological behaviour and processing conditions. This study focused on the rheological characteristics of two types of epoxy resins (low temperature- and high temperature-curing) and a bismaleimide resin and developed an evaluating method based on numerical simulation, providing guidelines to ensure consolidation. The rheological characteristics under isothermal conditions were examined and the determination of gel point using viscosity increment rate was adopted. The autoclave process for T700S carbon fibre composite laminates was simulated numerically and the effects of cure cycle, number of plies and lay-up type of fibre bed on consolidation were analysed. A process window was constructed to achieve the required degree of consolidation by adjusting the external pressure and the time of applying external pressure. The results showed that the quantitative impacts of processing conditions on consolidation and the feasibility of processing operations could be obtained from the established process window. 25 refs.
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