Exploring the pseudo-ductility of aligned hybrid discontinuous composites using controlled fibre-type arrangements

J. M. Finley, H. Yu, M. L. Longana, S. Pimenta*, M. S.P. Shaffer, K. D. Potter

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

13 Citations (Scopus)
241 Downloads (Pure)

Abstract

Pseudo-ductility presents a potential means for preventing catastrophic failure in composite materials; large deformations will prevent brittle fracture and provide warning before final failure. This work explores how the pseudo-ductility and strength of aligned hybrid discontinuous composites can be controlled by manipulating the arrangement of different fibre types. Aligned carbon/glass hybrid specimens with different fibre arrangements are manufactured and tested using a modification to the High Performance Discontinuous Fibre (HiPerDiF) method. Experimental results are complemented by an improved virtual testing framework, which accurately captures the fracture behaviour of a range of hybrid discontinuous composite microstructures. With a randomly intermingled fibre arrangement as a baseline, a 27% increase in strength and a 44% increase in pseudo-ductility can be achieved when low elongation fibres are completely isolated from one-another. Results demonstrate that the HiPerDiF method is the current state-of-the-art for maximising the degree of intermingling and hence the pseudo-ductility of hybrid composites.

Original languageEnglish
Pages (from-to)592-606
Number of pages15
JournalComposites Part A: Applied Science and Manufacturing
Volume107
Early online date8 Dec 2017
DOIs
Publication statusPublished - 1 Apr 2018

Keywords

  • Fracture
  • Hybrid
  • Microstructures
  • Pseudo-ductility

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  • Projects

    HiPerDuCT - Programme Grant - Full Proposal

    Bond, I. P., Etches, J. A., Mcalpine, H. C., Potter, K. D., Weaver, P. M., Bismarck, A., Shaffer, M. & Wisnom, M. R.

    1/07/1130/06/18

    Project: Research

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