Determination of a degradation-induced limit for the consolidation of CF/PEEK composites using a thermo-kinetic viscosity model - Archive ouverte HAL Access content directly
Journal Articles Composites Part A: Applied Science and Manufacturing Year : 2022

Determination of a degradation-induced limit for the consolidation of CF/PEEK composites using a thermo-kinetic viscosity model

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Olivier de Almeida
Lisa Feuillerat
Fabrice Schmidt

Abstract

In order to assess the impact of the thermal degradation of PEEK on the consolidation of composite preforms, an impregnation model taking into account degradation is proposed. It includes a viscosity model based on a double Arrhenius law describing the viscosity increase due to degradation. The implementation of this viscosity model into an impreg- nation model allowed to define an intrinsic processing window for the manufacturing of CF/PEEK composites based on a criterion of irrecoverable viscosity level. The simulation shows a good correlation with the experimentally measured porosity rates of commingled preforms. It predicts the absence of impregnation when increasing the consolidation time or the processing temperature from 380 to 410°C. Above 410°C or when increasing the pressure, however, a discrepancy is observed between the model and the simulation. This discrepancy is attributed to a change in the degradation kinetics resulting from a change in oxygen access.
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Dates and versions

hal-03637394 , version 1 (05-05-2022)

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Olivier de Almeida, Lisa Feuillerat, Jean-Charles Fontanier, Fabrice Schmidt. Determination of a degradation-induced limit for the consolidation of CF/PEEK composites using a thermo-kinetic viscosity model. Composites Part A: Applied Science and Manufacturing, 2022, 158, pp.106943. ⟨10.1016/j.compositesa.2022.106943⟩. ⟨hal-03637394⟩
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