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Holistic and Consistent Design Process for Hollow Structures Based on Braided Textiles and RTM

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Abstract

The present paper elaborates a holistic and consistent design process for 2D braided composites in conjunction with Resin Transfer Moulding (RTM). These technologies allow a cost-effective production of composites due to their high degree of automation. Literature can be found that deals with specific tasks of the respective technologies but there is no work available that embraces the complete process chain. Therefore, an overall design process is developed within the present paper. It is based on a correlated conduction of sub-design processes for the braided preform, RTM-injection, mandrel plus mould and manufacturing. For each sub-process both, individual tasks and reasonable methods to accomplish them are presented. The information flow within the design process is specified and interdependences are illustrated. Composite designers will be equipped with an efficient set of tools because the respective methods regard the complexity of the part. The design process is applied for a demonstrator in a case study. The individual sub-design processes are accomplished exemplarily to judge about the feasibility of the presented work. For validation reasons, predicted braiding angles and fibre volume fractions are compared with measured ones and a filling and curing simulation based on PAM-RTM is checked against mould filling studies. Tool concepts for a RTM mould and mandrels that realise undercuts are tested. The individual process parameters for manufacturing are derived from previous design steps. Furthermore, the compatibility of the chosen fibre and matrix system is investigated based on pictures of a scanning electron microscope (SEM). The annual production volume of the demonstrator part is estimated based on these findings.

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Acknowledgments

The authors would like to thank the Department of Science, Research and Art Baden-Wuerttemberg (AZ 32-729.85-1/90) and the Technology-Cluster Composites (TC2) for funding and supporting the work presented here.

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Authors and Affiliations

  1. Institute of Aircraft Design, Pfaffenwaldring 31, 70569, Stuttgart, Germany

    Florian Gnädinger & Peter Middendorf

  2. Fraunhofer Institute for Chemical Technology (ICT), 76327, Pfinztal, Germany

    Michael Karcher & Frank Henning

  3. Institute for Vehicle System Technology, Karlsruhe Institute of Technology, Karlsruhe, Germany

    Michael Karcher & Frank Henning

Authors
  1. Florian Gnädinger
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  2. Michael Karcher
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  3. Frank Henning
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  4. Peter Middendorf
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Correspondence to Florian Gnädinger.

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Gnädinger, F., Karcher, M., Henning, F. et al. Holistic and Consistent Design Process for Hollow Structures Based on Braided Textiles and RTM. Appl Compos Mater 21, 541–556 (2014). https://doi.org/10.1007/s10443-013-9370-3

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  • DOI: https://doi.org/10.1007/s10443-013-9370-3

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