Investigations on the temperature and strain rate dependent behavior of a reinforced thermoplastic: application in hot incremental forming

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Investigations on the temperature and strain rate dependent behavior of a reinforced thermoplastic: application in hot incremental forming

FADDOULD Josephine, RAHME Pierre, GUINES Dominique, LEOTOING Lionel

Abstract. This study focuses on characterizing the thermo-viscoplastic behavior of a glass fiber reinforced polypropylene through an advanced characterization technique. Based on a preliminary work addressing a mechanical characterization from conventional uniaxial tests, the proposed rheological model is calibrated using the database of in-plane equi-biaxial tensile tests on a dedicated cruciform specimen geometry from room temperature up to 140°C. The Finite Element Model Update (FEMU) method is employed for parameter calibration. A comparative analysis with the model calibrated from prior uniaxial tests is conducted through finite element simulations of a forming process. This investigation includes a parametric study to objectively assess the impact of the behavior law on forming force and final profile. This parametric study has direct implications for the simulation of an original forming process. The ability to identify the differences in forming outcomes based on different behavior laws enhances the predictive accuracy of the simulations. This ensures that the chosen behavior law aligns closely with the real behavior of the material during forming.

Keywords
Reinforced Thermoplastic, Thermo-Viscoplasticity, FE Modeling, Mechanical Characterization

Published online 4/24/2024, 9 pages
Copyright © 2024 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: FADDOULD Josephine, RAHME Pierre, GUINES Dominique, LEOTOING Lionel, Investigations on the temperature and strain rate dependent behavior of a reinforced thermoplastic: application in hot incremental forming, Materials Research Proceedings, Vol. 41, pp 2252-2260, 2024

DOI: https://doi.org/10.21741/9781644903131-248

The article was published as article 248 of the book Material Forming

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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