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Mechanisms of failure in the static indentation resistance of auxetic carbon fibre laminates
Author(s) -
Coenen V. L.,
Alderson K. L.
Publication year - 2011
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201083977
Subject(s) - indentation , materials science , auxetics , composite material , delamination (geology) , breakage , modulus , paleontology , biology , subduction , tectonics
Carbon fibre laminates were produced with matched through‐the‐thickness modulus, but with negative (auxetic), positive and near zero through‐the‐thickness Poisson's ratios. These were indented with noses of diameter 2, 12.7 and 20 mm. Enhancements in indentation resistance were seen for the auxetic laminates with smaller, more localized damage areas for the two larger diameter indentors where delamination was the dominant failure mechanism. Little difference was seen in mechanical properties for the 2 mm diameter indentor where fibre breakage was the dominant failure mechanism, though smaller damage areas are still obtained in this case due to delamination growth suppression.