Modelling of the in-plane shear behavior of uncured thermoset prepreg

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

Abstract

The in-plane shear behavior of prepreg material is one of the key parameters that affect defect generation in composites manufacturing processes, like Automated Fiber Placement (AFP) and Thermoforming. Recently a new characterization method for the in-plane shear of uncured prepreg under processing conditions was proposed. A strong influence of test/deformation rate and temperature was revealed. The present contribution proposes a way forward for predictive modelling of the observed behavior. A phenomenological viscoelastic model at large deformation is proposed. Each of the model components relates to assumed physical micro-mechanical mechanisms such as friction between the fibers, tensile loading of the fibers, etc. The proposed model provides enough flexibility to be able to fit the experimental results well. It was then implemented into ABAQUS as a VUMAT user defined subroutine. Initial model verification was performed by comparing the FE prediction with the experimental data, which suggests that the model will be able to make accurate predictions of the in-plane shear behavior of prepreg under processing conditions for a wide range of temperatures and deformation rates.

Original languageEnglish
Title of host publicationProceedings of the American Society for Composites - 34th Technical Conference, ASC 2019
EditorsKyriaki Kalaitzidou
PublisherDEStech Publications, Inc.
ISBN (Electronic)9781605956022
DOIs
Publication statusPublished - 2019
Event34th Technical Conference of the American Society for Composites, ASC 2019 - Atlanta, United States
Duration: 23 Sep 201925 Sep 2019

Publication series

NameProceedings of the American Society for Composites - 34th Technical Conference, ASC 2019

Conference

Conference34th Technical Conference of the American Society for Composites, ASC 2019
CountryUnited States
CityAtlanta
Period23/09/1925/09/19

Bibliographical note

Publisher Copyright:
© 2019 by DEStech Publications, Inc. and American Society for Composites. All rights reserved.

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

Keywords

  • Experimentalcharacterization
  • In-plane shear behavior
  • Numerical modelling
  • Thermoset prepreg

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