By adding glass fibres to carbon fibre composites, the apparent failure strain of the carbon fibres can be increased. A strength model for unidirectional hybrid composites was developed under very local load sharing assumptions to study this hybrid effect. Firstly, it was shown that adding more glass fibres leads to higher hybrid effects. The hybrid effect was up to 32% for a hybrid composite with a 10/90 ratio of carbon/glass fibres. The development of clusters of broken fibres helped to explain differences in the performance of these hybrid composites. For 50/50 carbon/glass hybrids, a fine bundle-by-bundle dispersion led to a slightly smaller hybrid effect than for randomly dispersed hybrids. The highest hybrid effect for a 50/50 ratio, however, was 16% and was achieved in a composite with alternating single fibre layers. The results demonstrate that thin ply hybrids may have more potential for improved mechanical properties than comingled hybrids.
|Number of pages||9|
|Journal||Composites Part A: Applied Science and Manufacturing|
|Early online date||8 Dec 2014|
|Publication status||Published - 1 Feb 2015|
The work leading to this publication has received funding from the European Union Seventh Framework Programme (FP7/2007–2013) under the topic NMP-2009-2.5-1, as part of the project HIVOCOMP (Grant Agreement No. 246389). The authors thank the Agency for Innovation by Science and Technology in Flanders (IWT) for a grant given to Y. Swolfs. I. Verpoest holds the Toray Chair at KU Leuven. We acknowledge support from the UCSB Center for Scientific Computing at CNSI, the UCSB MRL: an NSF MRSEC (DMR-1121053) and NSF Grant CNS-0960316.
- A. Carbon fibre
- A. Hybrid
- B. Fracture
- C. Computational modelling