Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Virtual ensuring the of the forming operation of the wet moulding process with non-crimp fabrics



Datum: 18.07.2016


Author

  • Dr.-Ing. Thomas Senner

Reporter

  • Prof. Dr.-Ing. habil. M. Merklein
  • Prof. Dr.-Ing. D. Drummer

The forming operation within the manu-facturing process of carbon fibre rein-forced plastic parts can cause fibre waviness and wrinkles. These imperfections in the fibre orientation can result in parts that are not fulfilling their functional requirements. In this work, a methodology was developed which enables predicting these imperfections. Thus, the methodology allows a virtual design of the forming operation in an industrial environment. By characterising and modelling of the bending behaviour as well as the influ-ence of the stitch structure on the forming behaviour, the predictive quality regarding wrinkles could be improved compared to the state of the art. Furthermore, it was shown by an experimental and numerical analysis of an innovative restraining system that the latter is capable to prevent the formation of wrinkles. Finally, two experimental methods for validating the simulation models were presented which allow characterising the fibre orientation in the intermediate plies of multi-layer composites.