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A Sequential Approach for Simulation of Thermoforming and Squeeze Flow of Glass Mat Thermoplastics

ESAFORM 2021 | 24th International Conference on Material Forming, 2021-04

DOI: 10.25518/esaform21.376

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  • Title:
    A Sequential Approach for Simulation of Thermoforming and Squeeze Flow of Glass Mat Thermoplastics
  • Author: Dominik Dörr ; Stanislav Ivanov ; Ryan Gergely ; Nils Meyer ; Frank Henning ; Anthony G. Straatman ; Andrew Hrymak
  • Is Part Of: ESAFORM 2021 | 24th International Conference on Material Forming, 2021-04
  • Description: In this study, a sequential thermoforming and squeeze flow simulation approach for Glass Mat Thermoplastic (GMT) material is proposed and applied to a hat section geometry using input properties based upon Tepex flowcore, a long glass fiber reinforced polyamide (PA/GF) mat manufactured by Lanxess. First, a fully-coupled thermomechanical simulation is conducted based on a purely Lagrangian description, to efficiently capture thermoforming. Subsequently, relevant state variables are mapped and initialized for a Coupled-Eulerian-Lagrangian (CEL) approach. The CEL approach is adopted to accurately capture squeeze flow, which is not possible by a purely Lagrangian description. While numerical techniques differ, both approaches use the same three-dimensional and thermomechanical constitutive equations including an equation of state, a nonlinear viscosity model, and crystallization kinetics, implemented through a material user-subroutine (VUMAT) for the commercially available simulation software package ABAQUS/Explicit.
  • Publisher: Université de Liège
  • Language: English
  • Identifier: DOI: 10.25518/esaform21.376
  • Source: Portail de Publication de Périodiques Scientifiques PoPuPS
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