Abstract
Thermoplastic composites are emerging in the automotive industry as serious competitors to typical epoxy composites thanks to their higher toughness and reprocessability. Additionally, composites with polymer fibres can yield higher impact resistance than composites with conventional structural fibres like carbon and glass, while still delivering a high stiffness. In this work, woven composites with different fiber types (aramid, poly(p-phenylene-2,6-benzobisoxazole) (PBO), polyarylate (PAR), carbon) and different matrices (epoxy, polypropylene) were investigated under penetrating impact. It was found that aramid-PP composites absorb 2.82 times the energy of aramid-epoxy. PBO-PP absorbed almost twice as much energy as the other polymer fibre composites. PBO-PP and PAR-PP fractured the specimen with an unusual “X” shape while all other composites exhibited a “+“shape, which is typical for woven fabric composites. It is hypothesised that the unusual failure shape and the high energy absorption are linked to the high fibre anisotropy.
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