Vacuum forming of thermoplastic foam

Authors

  • Remko Akkerman,

    Corresponding author
    1. University of Twente, Department of Mechanical Engineering, P.O. Box 217, NL-7500 AE Enschede, the Netherlands
    • University of Twente, Department of Mechanical Engineering, P.O. Box 217, NL-7500 AE Enschede, the Netherlands
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  • Ruud Pronk

    1. University of Twente, Department of Mechanical Engineering, P.O. Box 217, NL-7500 AE Enschede, the Netherlands
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Abstract

The process of thermoforming of foam sheet is analyzed using both finite element modeling and experiments. A simple constitutive model for finite tensile deformations of closed cellular material around its glass transition temperature is proposed, starting from well-known results from Gibson and Ashby (1988). The model is implemented in a finite element code and applied in isothermal vacuum forming simulations. The distributions of thickness and in plane strains are in adequate accordance to the experimental results.

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