Abstract
In order to use composite materials in aeronautical turbo engines, their resistance to impact damage caused by soft bodies (birds) must be understood. In this work the subperforation flat wise soft body impact resistance of two kinds of carbon fiber/PEEK systems were evaluated using a gelatin projectile. Tested systems were AS4/PEEK (APC2/AS4) and AS4/PEEK + IL, which consists of APC 2 prepreg and PEEK film inserted between layers as an interleave. To investigate the effects of stacking sequence on resistance, three lay ups were tested. A gas gun system was used for the impact tests, where the velocity range was between 90 and 190 m/s. Mass of the projectile was about 3 g. The projected damage area was measured with an ultrasonic C Scan. The dynamic strain response was also measured for some of the impact tests. The impact resistance to soft body impact is compared with that of hard body impact investigated in a previous study by the first author.
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