Abstract
The main objective of this work was to investigate the effect of intralaminar hybridization on the mode I fracture toughness of epoxy composites based on jute and sisal fabrics. Four types of composites were produced by the hand layup technique: sisal (S), sisal + curauá (S + C), jute (J) and jute + curauá (J + C). Double cantilever beam (DCB) tests were performed, and the modified beam theory (MBT) method and three different data criteria (i.e. the deviation from linearity (NL), the 5% offset/maximum load (5%/Max) and visual observation (VIS)) were used to evaluate the mode I fracture toughness (GIc). It was found that the GIc of S + C and J + C composites increased by hybridization of pure sisal and jute fabrics and that the intralaminar hybridization limited the crack propagation. An X-ray microcomputed tomography (µCT) equipment was used to visualize the delamination and the form of the front of cracks inside the hybrid composites.
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Acknowledgements
This project is partially supported by the National Council for Scientific and Technological Development (CNPq), processes 308478/2017-7 and 424499/2016-9 and FAPERJ, Project No. E_10/245.202/2019.
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Pereira, A.L., Banea, M.D. & Pereira, A.B. Effect of intralaminar hybridization on mode I fracture toughness of natural fiber-reinforced composites. J Braz. Soc. Mech. Sci. Eng. 42, 451 (2020). https://doi.org/10.1007/s40430-020-02525-w
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DOI: https://doi.org/10.1007/s40430-020-02525-w