On the characterisation of transverse tensile properties of molten unidirectional thermoplastic composite tapes for thermoforming simulations

A. Margossian, S. Bel, R. Hinterhoelzl

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

The development of Finite Element (FE) thermoforming simulations of tailored thermoplastic blanks, i.e. blanks composed of unidirectional pre-impregnated tapes, requires the characterisation of the composite tape under the same environmental conditions as forming occurs. This paper presents a novel approach for the characterisation of transverse tensile properties of unidirectional thermoplastic tapes using a Dynamic Mechanical Analysis (DMA) system in a quasi-static manner. The relevance of the presented method is assessed by testing, under the same environmental conditions, a control material with both a universal testing machine and a DMA system. For simulation purposes, a unidirectional thermoplastic tape is characterised under environmental forming conditions using the presented test method. Experimental results, which include stress-strain behaviour and transverse viscosity, are eventually used to identify, via an inverse approach, simulation parameters of a thermo-visco-elastic composite material model (MAT 140, PAM-Form, ESI Group). Comparisons between simulated and experimental results show good agreement.

Original languageEnglish
Pages (from-to)48-58
Number of pages11
JournalComposites Part A: Applied Science and Manufacturing
Volume88
DOIs
Publication statusPublished - 1 Sept 2016

Keywords

  • A. Prepreg
  • C. Finite element analysis (FEA)
  • D. Mechanical testing
  • E. Forming

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