A directed continuum damage mechanics method for modelling composite matrix cracks

Supratik Mukhopadhyay*, Stephen Hallett

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

10 Citations (Scopus)
81 Downloads (Pure)

Abstract

Matrix cracking in continuous fibre reinforced composites follows the fibre orientations, but continuum damage mechanics models are not able to properly capture this. A novel method is presented here to alleviate mesh sensitivity of the damage growth direction and represent discrete matrix cracks. In a ply-by-ply mesoscale model, matrix cracks within a ply usually rely on mesh dependent strain localisation to decide the crack growth direction. The newly proposed algorithm instead uses the ply level fibre orientation as a model input, and maintains crack advancement along this direction, based on a neighbour searching scheme. A further advantage is that it is able to represent individual cracks discretely, with a predefined minimum crack spacing. This overcomes another limitation of continuum damage models, where discrete cracks are only represented in a smeared sense. This procedure has been shown to be able to reproduce complex crack networks in multidirectional laminates, independent of the mesh pattern.
Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalComposites Science and Technology
Volume176
Early online date28 Mar 2019
DOIs
Publication statusPublished - 26 May 2019

Structured keywords

  • Bristol Composites Institute ACCIS

Keywords

  • A. Structural composites
  • B. Matrix cracking
  • C. Damage mechanics
  • C. Finite element analysis (FEA)
  • Tracking algorithms

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