Journal
COMPOSITE STRUCTURES
Volume 211, Issue -, Pages 564-576Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2018.12.044
Keywords
Stress concentration; Hybrid composites; Modelling; Micro-mechanics
Categories
Funding
- Spanish Ministerio de Economia, Industria y Competitividad (MINECO) - European Regional Development Fund (ERDF) [MAT2015-69491-C3-1-R, TRA2015-71491-R]
- Subprograma Estatal de Formacion del MICINN - European Social Fund [BES-2016-078270]
- Portuguese Government's Fundacao para a Ciencia e Tecnologia [SFRH/BD/115872/2016]
- SciTech Science and Technology for Competitive and Sustainable Industries [NORTE-01-0145-FEDER-000022]
- Programa Operacional Regional do Norte (NORTE2020), through ERDF
- Programa Operacional Competitividade e Internacionalizacao, through ERDF [PTDC/EMS-PRO/4732/2014]
- Programa Operacional Regional de Lisboa, through ERDF [PTDC/EMS-PRO/4732/2014]
- National Funds through FCT - Fundacao para a Ciencia e Tecnologia [PTDC/EMS-PRO/4732/2014]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/115872/2016, PTDC/EMS-PRO/4732/2014] Funding Source: FCT
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This paper presents an analytical model to predict the stress redistribution around broken fibres in hybrid polymer composites. The model is used under the framework of a progressive failure approach to study the load redistribution around breaks in hybrid composites. The outcomes of the model are validated by comparing it with a spring element model. Moreover, the approach is further used to study the tensile behaviour of different hybrid composites. The results obtained show that the load redistribution around breaks depends on the stiffness ratio between both fibres as well as the matrix behaviour considered and the hybrid volume fraction. Furthermore, the different material parameters have a large effect on the tensile behaviour, with an increase of ductility achieved if the failure process of the two fibres is gradual.
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