Numerical Modeling of Interply Adhesion in Composite Forming of Viscous Discontinuous Thermoplastic Prepregs
| Autor: | Adrien Leygue, Damien Guillon, Sébastien Comas-Cardona, Pierre Pichon, Paris Dilip Mulye, Christophe Binetruy, Lionel Morançay, Julie Hemmer |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Thermoplastic Composite number Full scale 02 engineering and technology 010402 general chemistry 01 natural sciences Blank Industrial and Manufacturing Engineering Stack (abstract data type) Artificial Intelligence Composite material Process simulation Thermoforming chemistry.chemical_classification Computer simulation Mechanical Engineering Delamination Process (computing) Forming processes Adhesion 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Mechanics of Materials Ceramics and Composites 0210 nano-technology |
| Zdroj: | Procedia Manufacturing. 47:71-73 |
| ISSN: | 2351-9789 |
| DOI: | 10.1016/j.promfg.2020.04.135 |
| Popis: | “Quilted Stratum Process” (QSP®) is a new process in the category of thermoplastic composite forming with the objective to locally strengthen the composite parts by strategically stacking discontinuous UD/woven prepregs while maintaining the short cycle time of about 1 min. Interply adhesion arising due to polymer tack plays an important role in QSP® due to the presence of resin-rich layer at the ply-ply interface, inability to use blank holders for prepreg patches and high temperature of forming process where the resin is in melt state. Without modeling interply adhesion in the numerical simulation of their forming, plies delaminate unrealistically without any resistance which in turn results in incorrect final positions of the prepreg patches. Thus, a penalty based, semi-empirical contact model for interply adhesion has been developed and implemented in the industrial finite element code of Altair RADIOSS™. This model allows sliding of plies over long distance while providing a finite adhesive strength before delamination. It requires minimal characterization for which a measurement method is proposed. The usage of this model in a full scale numerical simulation showed that the final ply positions were predicted with a much better accuracy. Also, the predictions of fibre orientations within individual plies are in good agreement with the experimental observations. |
| Databáze: | OpenAIRE |
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