Impact resistance of plain and twill fabric in GFRP measured by active thermography
2018
This paper discusses the impact resistance of glass-fibre reinforced polymer (GFRP) composites depending on
the type of reinforcement – plain or twill weave. The values of impact energy were: 3J, 10J and 15J. Specimens
featuring twill weave transferred higher force during the impact as compared with plain weave specimens.
It was observed that an increase of impact energy was accompanied by an increase of the disproportion in
transferred forces, in favour of twill weave specimens. Impact damage (in both types of weave) occurring as a
result of 3J impact was undetectable with active thermography method. The damage area measured by means
of active thermography for impact energy values equal to 10J and 15J proved that the type of reinforcement
significantly influences the impact resistance of a composite.This has been justified by smaller damage areas
with high spot intensity of damage in plain weave specimens and highly dispersed damage with lower intensity
in twill weave specimens.
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