Interaction of inter- and intralaminar damage in scaled quasi-static indentation tests: Part 1 – Experiments

Emmanuelle Abisset, Federica Daghia, Ric Sun, Michael Wisnom, Stephen Hallett

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

60 Citations (Scopus)
346 Downloads (Pure)

Abstract

The evaluation of the predictive capabilities of models proposed in the literature for laminated composites calls for experimental testing providing detailed results of both the global and local response in terms of degradation mechanisms, such as delamination, transverse cracking and fibre breaking. Scaled tests, in which one or more characteristic dimensions are modified, allow variation of the different mechanisms. In this paper, a unique series of scaled indentation tests are performed on quasi-isotropic composite plates, and a detailed assessment of the damage evolution is carried out through non-destructive techniques, including ultrasonic C-scan and X-ray Computed Tomography (CT). Four different configurations are tested, presenting changes in both in-plane dimensions and fully three dimensional scaled cases. The latter are performed with sublaminate and ply scaling to show the effect of ply thickness on response. A detailed set of results for both global behaviour and the damage evolution is provided to demonstrate the mechanisms controlling behaviour and to create a reference set of data for model validation. The scaling effects observed are also discussed making use of simplified analytical models.
Original languageEnglish
Pages (from-to)712-726
Number of pages15
JournalComposite Structures
Volume136
Early online date22 Oct 2015
DOIs
Publication statusPublished - 1 Feb 2016

Keywords

  • Laminates
  • Static indentation
  • Analytical modelling
  • Impact damage
  • Mechanical testing

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