期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 73, 期 -, 页码 35-44出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2015.02.014
关键词
Hybrid; Discontinuous reinforcement; Fragmentation; Preform
资金
- UK Engineering and Physical Sciences Research Council (EPSRC) [EP/I02946X/1]
- Imperial College, London
- EPSRC [EP/I02946X/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/I02946X/1] Funding Source: researchfish
The aim of this research is to manufacture intermingled hybrid composites using aligned discontinuous fibres to achieve pseudo-ductility. Hybrid composites, made with different types of fibres that provide a balanced suite of modulus, strength and ductility, allow avoiding catastrophic failure that is a key limitation of composites. Two different material combinations of high strength carbon/E-glass and high modulus carbon/E-glass were selected. Several highly aligned and well dispersed short fibre hybrid composites with different carbon/glass ratios were manufactured and tested in tension in order to investigate the carbon ratio effect on the stress strain curve. Good pseudo-ductile responses were obtained from the high modulus carbon/E-glass composites due to the fragmentation of the carbon fibres. The experimental results were also compared with an analytical solution. The intermingled hybrid composite with 0.25 relative carbon ratio gave the maximum pseudo-ductile strain, 1.1%, with a 110 GPa tensile modulus. Moreover, the initial modulus of the intermingled hybrids with 0.4 relative carbon ratio is 134 GPa, 3.5 times higher than that of E-glass/epoxy composites. The stress strain curve shows a clear yield point at 441 MPa and a well dispersed and gradual damage process. (C) 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
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