The Bending Behaviour Characterisation of Thermoplastic Prepregs and its Influence on the Wrinkling

Abstract:

The bending deformation of thermoplastic prepregs is one of the key deformation modes in the thermoforming due to its crucial role in the wrinkling occurrence. The influence of temperature is of main importance because the viscous effect of resin is temperature dependent and prepregs thermoforming is usually performed closed to resin’s melting point. The currently available bending test devices are not adapted for thermoplastic prepregs since these devices can only be operated at room temperature. To solve this problem, a new cantilever test with an optical measuring performed in an environmental chamber is proposed. The bending properties of PPS-carbon satin prepregs are measured at a series of high temperatures. It’s shown that the bending stiffness of the fore-mentioned pepregs is strongly affected by the temperature and shows a non-linear bending behaviour. The measured bending properties are used to simulate a thermoforming process. The influence of bending properties on the simulation results, especially to the wrinkling is presented as well.

• Periodical: Key Engineering Materials (Volumes 651-653)
• Pages: 356-362
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.651-653.356
• Online since: July 2015
• Authors: Biao Liang, Nahiene Hamila, Philippe Boisse*
• Keywords: Bending, Forming, Prepreg, Thermoplastic Resin

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