@article{article_1815248, title={Impact toughness of CPP- and PET-Based hybrid thermoplastic laminates under edgewise charpy testing}, journal={Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi}, volume={32}, year={2025}, DOI={10.5505/pajes.2025.55874}, author={Pulgu, Nida and Erkliğ, Ahmet}, keywords={Charpy darbe testi, Elyaf takviyeli termoplastikler, Darbe tokluğu, Hibrit kompozitler, Emilen enerji}, abstract={This study examines the Charpy impact characteristics of laminated thermoplastic composites made from cast polypropylene (CPP) and polyethylene terephthalate (PET) matrices, reinforced with glass,
carbon, and hybrid fiber stacking sequences. Laminates for composite materials were produced using the process of stacking films and hotpressing them, followed by cutting, and then tested according to ISO 179-1 directives. The Charpy impact test was performed on five specimens for each configuration to measure both impact energy and toughness. The data show that both the matrix’s plasticity and the stacking sequence significantly influence the impact response. CPP composites displayed the best toughness against plain configurations of 7.2 J for carbon and 5.4 J for glass, while the hybrids reached up to 7.26 J for glass–carbon–glass and 6.65 J for carbon–glass–carbon. PET composites carried less toughness in standard configurations of 4.5 J for both carbon and glass, while the hybrid carbon–glass–carbon configuration improved toughness to 7.45 J. The CPP_GCG laminate absorbed about 86% more energy than the PET_G, while CPP composites absorbed 30–35% more than PET composites for all the studied stacking structures. The fractography of specimens confirmed the occurrence of ductile fracture for the CPP composites and brittle failure for the PET composites. The data demonstrate the effectiveness of combining a ductile matrix with hybrid stacking structures to elevate he toughness against impacts, as well as the tolerance to damages for laminated composites.}, number={2}, publisher={Pamukkale Üniversitesi}