Mixed-Mode Interlaminar Fracture Toughness of Glass and Carbon Fibre Powder Epoxy Composites—For Design of Wind and Tidal Turbine Blades

Type Article
Date 2021-05
Language English
Author(s) Floreani Christophe1, Robert Colin1, Alam ParvezORCID1, Davies PeterORCID2, Ó. Brádaigh Conchúr M.ORCID1
Affiliation(s) 1 : School of Engineering, Institute for Materials and Processes, The University of Edinburgh, Edinburgh EH9 3FB, UK
2 : Ifremer, Marine Structures Laboratory, 29280 Plouzané, France
Source Materials (1996-1944) (MDPI AG), 2021-05 , Vol. 14 , N. 9 , P. 2103 (21p.)
DOI 10.3390/ma14092103
Note This article belongs to the Special Issue Towards Toughened Composites: Present and Future Challenge
Keyword(s) toughened composites, fracture toughness, delamination
Abstract

Powder epoxy composites have several advantages for the processing of large composite structures, including low exotherm, viscosity and material cost, as well as the ability to carry out separate melting and curing operations. This work studies the mode I and mixed-mode toughness, as well as the in-plane mechanical properties of unidirectional stitched glass and carbon fibre reinforced powder epoxy composites. The interlaminar fracture toughness is studied in pure mode I by performing Double Cantilever Beam tests and at 25% mode II, 50% mode II and 75% mode II by performing Mixed Mode Bending testing according to the ASTM D5528-13 test standard. The tensile and compressive properties are comparable to that of standard epoxy composites but both the mode I and mixed-mode toughness are shown to be significantly higher than that of other epoxy composites, even when comparing to toughened epoxies. The mixed-mode critical strain energy release rate as a function of the delamination mode ratio is also provided. This paper highlights the potential for powder epoxy composites in the manufacturing of structures where there is a risk of delamination

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How to cite 

Floreani Christophe, Robert Colin, Alam Parvez, Davies Peter, Ó. Brádaigh Conchúr M. (2021). Mixed-Mode Interlaminar Fracture Toughness of Glass and Carbon Fibre Powder Epoxy Composites—For Design of Wind and Tidal Turbine Blades. Materials, 14(9), 2103 (21p.). Publisher's official version : https://doi.org/10.3390/ma14092103 , Open Access version : https://archimer.ifremer.fr/doc/00692/80371/