Demonstration of pseudo-ductility in high performance glass-epoxy composites by hybridisation with thin-ply carbon prepreg
359 citations recorded by the source corpus.
Abstract A new approach and material architecture is presented in order to overcome the inherent brittleness and unstable failure characteristic of conventional high performance composites. The concept is the use of thin-ply hybrid laminates. Fracture mechanics calculations were carried out to determine the critical carbon layer thickness for stable pull-out in a three layer unidirectional hybrid laminate, which can provide a pseudo-ductile failure. Unidirectional hybrid composites were fabricated by sandwiching various numbers of thin carbon prepreg plies between standard thickness glass prepreg plies and tested in tension. Specimens with one and two plies of thin carbon prepreg produced pseudo-ductile failure, whereas ones with three and four plies failed with unstable delamination. An explanation of the different failure modes is given in terms of the different energy release rates for delamination in various specimens. The observed damage characteristics agreed well with the expectations according to the estimated critical carbon layer thickness.
Subfields: Building and Construction, Mechanical Engineering, Mechanics of Materials
View Paper: https://www.semanticscholar.org/paper/e647ab563c50fd64a3db73f847755504d4b9a90c
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In Building and Construction
In Mechanical Engineering
In Mechanics of Materials
Citations in the corpus
- Damage analysis of pseudo-ductile thin-ply UD hybrid composites - A new analytical method (2015, methodology): “The first set of materials, E-glass epoxy/TR30 high strength carbon epoxy hybrid, has been experimentally studied [13] with the layups of [EG/Cm/EG] (m = 1,2) and [EG2/Cn/EG2] (n = 1–4) where EG and C stand for the UD 0.”
- Recent advances in fibre-hybrid composites: materials selection, opportunities and applications (2019, methodology): “While this is certainly the most common composite type where fragmentation has been observed [8,161,219,220], ply fragmentation can also occur in other composite types.”
- Micro-mechanical analysis of the in situ effect in polymer composite laminates (2014, background): “In addition, a truthful insight on the mechanics of thin-ply laminates is sought using the proposed micro-mechanical model, including a better understanding of their damage mechanics and of the mechanisms that preclude both microcracking and delamination, as observed elsewhere [4, 6, 10, 11, 19, 20,”
- Numerical modelling of the damage modes in UD thin carbon/glass hybrid laminates (2014, background): “All of the predicted damage modes in each laminate are in agreement with the observed experimental behaviour [7].”
- Fibre hybridisation in polymer composites: a review (2014, methodology): “Thin plies have only rarely been used in hybrid composites, even though they are potentially interesting materials [13, 116].”
- Pseudo-ductility in intermingled carbon/glass hybrid composites with highly aligned discontinuous fibres (2015, background): “Recently, a smooth transition between those two regions was achieved using very thin carbon plies at the University of Bristol [15–18].”
- Design and characterisation of advanced pseudo-ductile unidirectional thin-ply carbon/epoxy-glass/epoxy hybrid composites (2016, methodology): “Thin-ply UD interlayer hybrid composites have recently demonstrated the potential for pseudo-ductility [31] through fragmentation and stable pull-out of a low strain (carbon) layer in the centre of the laminate from the outer high strain (glass) layers.”