Characterization of unidirectional carbon fiber reinforced polyamide-6 thermoplastic composite under longitudinal compression loading at high strain rate
Institute for Carbon Composites, Technische Universitaet Muenchen, Faculty of Mechanical Engineering, Boltzmannstraße 15, 85748 Garching bei Muenchen, Germany
a Corresponding author: firstname.lastname@example.org
Published online: 7 September 2015
In the presented work, an experimental investigation has been performed to characterize the strain rate dependency of unidirectional carbon fiber reinforced polyamide-6 composite for longitudinal compression loading. An end-loaded compression specimen geometry, suitable for contactless optical strain measurement via digital image correlation and dynamic loading in a split-Hopkinson pressure bar, was developed. For the dynamic experiments at a constant strain rate of 100 s−1 a modified version of the Dynamic Compression Fixture, developed by Koerber and Camanho [Koerber and Camanho, Composites Part A, 42, 462–470, 2011] was used. The results were compared with quasi-static test results at a strain rate of 3 · 10−4 s−1 using the same specimen geometry. It was found that the longitudinal compressive strength increased by 61% compared to the strength value obtained from the quasi-static tests.
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