Demonstration of pseudo-ductility in unidirectional hybrid composites made of discontinuous carbon/epoxy and continuous glass/epoxy plies

Gergely Czél*, Meisam Jalalvand, Michael R. Wisnom

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

55 Citations (Scopus)
434 Downloads (Pure)

Abstract

A new, partially discontinuous architecture is proposed to improve the mechanical performance of pseudo-ductile, unidirectional (UD) interlayer carbon/glass hybrid composites. The concept was successfully demonstrated in different laminates with high strength and high modulus carbon and S-glass epoxy UD prepregs. The novel hybrid architecture provided pseudo-ductile tensile stress-strain responses with a linear initial part followed by a wide plateau and a second linear part, all connected by smooth transitions. The best hybrid configuration showed 60% improvement in modulus compared to pure glass, 860 MPa plateau stress and 2% pseudo-ductile strain. The initial modulus, the plateau stress and the overall tensile stress-strain response of each specimen configuration were predicted accurately.

Original languageEnglish
Pages (from-to)75-84
Number of pages10
JournalComposites Part A: Applied Science and Manufacturing
Volume72
Early online date2 Feb 2015
DOIs
Publication statusPublished - May 2015

Keywords

  • B. Delamination
  • C. Damage mechanics
  • D. Mechanical testing
  • Discontinuous-ply composites

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