Squeeze flow in heterogeneous discontinuous viscous woven prepreg laminates

Squeeze flow in heterogeneous discontinuous viscous woven prepreg laminates

Grégoire Sorba Christophe Binetruy Adrien Leygue Sandeep Gudiwada Jean-Michel Lebrun François Bertrand Sébastien Comas-Cardona Thomas Jollivet 

GeM - Research Institute of Civil Engineering and Mechanics, UMR 6183, CNRS, École Centrale de Nantes - Université de Nantes 1 rue de la Noë F-44321 Nantes CEDEX

CETIM / Pôle Ingénierie Polymères et Composites Technocampus EMC2, Z. I. du Chaffault F-44340 Bouguenais

Corresponding Author Email: 
{gregoire.sorba,christophe.binetruy,adrien.leygue,jean-michel.lebrun,francois .bertrand,sebastien.comas}@ec-nantes.fr,sandeep.gudiwada@eleves.ec-nantes.fr; thomas.jollivet@cetim.fr
Page: 
35-53
|
DOI: 
https://doi.org/10.3166/RCMA.28.35-53
| |
Published: 
31 March 2018
| Citation

ACCESS

Abstract: 

Thermoplastic matrix composites reinforced with glass fiber reinforcements are viewed as an alternative to thermoset matrix composites for structural components in the automotive field, as they allow for lower costs and higher production rates. However, the forming of thermoplastic composites from a preform made of discontinuous plies is more sensitive to some defects, among which disorientation of the reinforcements originating from the bending and / or solid rotation of a discontinuous ply. These defects result from the polymer movements induced by the consolidation of the composite and degrade mechanical properties. For this reason, anticipating the risk of disorientation of the reinforcements during the manufacturing process is necessary to optimize the mechanical efficiency of the manufactured parts. This paper presents experiments conducted to identify the behavior of a stack of woven prepregs under compression and then proposes a model based on laminated isotropic and anisotropic fluid approach to describe and simulate this behavior numerically. Finally, experiments and simulations are compared to verify the validity of the model.

Keywords: 

anisotropic fluid, thermoplastic woven prepreg, consolidation, squeeze flow

1. Introduction
2. Experimental setup
3. Experimental observations
4. Model
5. Results
6. Conclusion
Acknowledgements

The authors would like to thank the DuPont company for providing the prepreg material.

  References

Cogswell F. N. (2013). Thermoplastic aromatic polymer composites: a study of the structure, processing and properties of carbon fibre reinforced polyetheretherketone and related materials. Elsevier.

Ghnatios C., Abisset-Chavanne E., Binetruy C., Chinesta F., Advani S. (2016). 3d modeling of squeeze flow of unidirectionally thermoplastic composite inserts. AIP Conference Proceedings, Vol. 1769, No. 1, pp. 170002. Retrieved from http://aip.scitation.org/doi/abs/10.1063/1.4963558

Guillon D., CO D., Priem C., Martin A., Rozycki P. (2016, June). A biphasic model to predict the compression strength of misaligned thermoplastic composite. In 17th European Conference on Composite Materials - ECCM17. Munich, Germany. Retrieved from https://hal.archives-ouvertes.fr/hal-01357301

Hughes T. J. R. (1974). Finite element analysis of incompressible viscous flows by the penalty function formulation. Journal of Computational Physics, Vol. 30, pp. 1–60.

McEntee S., Ó Brádaigh C. (1998). Large deformation finite element modelling of singlecurvature composite sheet forming with tool contact. Composites Part A: Applied Science and Manufacturing, Vol. 29, No. 1, pp. 207–213.

McGuinness G., Ó Brádaigh C. (1997). Development of rheological models for forming flows and picture-frame shear testing of fabric reinforced thermoplastic sheets. Journal of Non-Newtonian Fluid Mechanics, Vol. 73, No. 1, pp. 1–28.

Pipkin A. C., Rogers T. G. (1971). Plane deformations of incompressible fiber-reinforced materials. Journal of Applied Mechanics, Vol. 38, No. 3, pp. 634. Retrieved from https://doi.org/10.1115%2F1.3408866

Rogers T. (1989). Rheological characterization of anisotropic materials. Composites, Vol. 20, No. 1, pp. 21 - 27. Retrieved from http://www.sciencedirect.com/science/article/pii/0010436189906770

Schell J., Amory L., Guillon D., Chinesta F., Cueto E., Abisset-Chavanne E. (2016). Movement of patches during thermoforming: Experiment and simulation. In Aip conference proceedings, Vol. 1769, p. 170032.

Sorba G., Binetruy C., Chinesta F. (2016). In-plane shearing of a ud prepreg modeled as transversely isotropic fluid: Comparison between continuous and discontinuous fiber tension approaches. In Aip conference proceedings, Vol. 1769, p. 170008.

Spencer A. (1972). Deformations of fibre-reinforced materials. Clarendon Press. Retrieved from https://books.google.fr/books?id=uqdRAAAAMAAJ