A phenomenological material model for thermoplastic textile composites for crashworthiness simulation combining a stress- and strain-based failure criterion

Michael Richter, Gernot Oberhofer, Harry Dell, Helmut Gese, Fabian Duddeck

Research output: Contribution to journalReview articlepeer-review

5 Scopus citations

Abstract

Textile-reinforced thermoplastics offer a promising lightweight potential for semi-structural parts because of their high specific material and good deep-drawing properties as well as high capability of energy absorption. To realize this potential in an industrial context, appropriate simulation techniques have to be provided. Hence, this paper proposes a new macro-scale model based on different mechanical phenomena on micro-scale. Plasticity as well as damage and failure behavior are discussed in a multi-scale analysis which are then clustered characterizing the matrix- and fiber-dominated domains. The aim of this paper at hand is to model the complex material behavior of textile-reinforced thermoplastic composites phenomenologically on a macroscopic scale while using conventional shell discretization. This offers a good compromise between numerical accuracy and computational efficiency which renders it suitable for industrial crashworthiness simulation. An exemplary experimental characterization of an organic sheet is presented followed by a novel material characterization for the modular material model MF GenYld+CrachFEM. This covers orthotropic elasticity and mesoscopically homogenized plasticity until the onset of fracture by combining a stress- and strain-based criterion.

Original languageEnglish
Article number110490
JournalThin-Walled Structures
Volume184
DOIs
StatePublished - Mar 2023

Keywords

  • Crashworthiness
  • Damage
  • Failure
  • Lightweight design
  • MF GenYld+CrachFEM
  • Organic sheets
  • Plasticity
  • Twill-weave fabrics

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