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 language | English |
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Pages (from-to) | 592-606 |
Number of pages | 15 |
Journal | Composites Part A: Applied Science and Manufacturing |
Volume | 107 |
Early online date | 8 Dec 2017 |
DOIs | |
Publication status | Published - 30 Apr 2018 |
Funding
This work was funded under the UK Engineering and Physical Sciences Research Council (EPSRC) programme grant EP/I02946X/1 on High Performance Ductile Composite Technology. S. Pimenta acknowledges the support from the Royal Academy of Engineering for her Research Fellowship on Multiscale discontinuous composites for large scale and sustainable structural applications (2015–2019).
Keywords
- Fracture
- Hybrid
- Microstructures
- Pseudo-ductility
ASJC Scopus subject areas
- Ceramics and Composites
- Mechanics of Materials
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HaNa Yu
- Department of Mechanical Engineering - Lecturer In Future Manufacturing Engineering
Person: Research & Teaching