Paper number 192
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MODEL OF THERMOMECHANICAL BEHAVIOUR OF POLYMERS IN GLASS TRANSITION STATE AND ITS APPLICATION TO THE ANALYSIS OF TECHNOLOGICAL STRESSES IN POLYMERS |
V. Matveyenko1, N. Trufanov2, I. Shardakov1
1Institute of Continuous Media Mechanics, Ural Branch of RAS,
Acad. Korolev Street, Perm, 614013, Russia
2Perm State Technical University,
9a, Komsomolsky prospect, Perm, 614000, Russia
| Summary | A mathematical model is presented to describe the evolution of the stress-strain state in fiber-reinforced composites with a plastic binder capable of glass transition. The model is based on the phenomenological methods of continuum mechanics and phenomenological macrokinetics of the chemical-physical processes ( polymerization, glass transition ) in a plastic binder. A set of experiments has been specified to identify the model parameters. Numerical solutions are presented which demonstrate the effectiveness of the model. With this model we have described the evolution of engineering and residual stresses as well as polymerization and glass transition processes in a hybrid composite manufactured by hot molding in a curing autoclave. A numerical analysis has been carried out to calculate the dependence of engineering and residual stresses in a composite under different manufacturing conditions and to define the process parameters which provide a minimum level of residual stresses. |
Keywords | technological stresses, glass transition, polymerization, numerical modeling. |