Abstract

The chapter is focused on fibre-reinforced thermoplastics. The fibre reinforcement improves their mechanical properties but the fibre orientation which results from the injection moulding process has a major influence. The chapter contains results of experimental observations of fibre length distribution, concentration and orientation for complex enough situations in order to describe problems encountered in real industrial processes. Then, the models which allow describing the evolution of fibre orientation in a flow motion are exposed. Finally, computations are made with an injection moulding simulation tool (Rem3D) in which these models are available. The comparison with experimental data concerning fibre orientation prediction gives information on the validity and the influence of various parameters associated with these models.

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