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
| | | | Citation



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.


anisotropic fluid, thermoplastic woven prepreg, consolidation, squeeze flow

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

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


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