TY  - JOUR
T1  - Impact toughness of CPP- and PET-Based hybrid thermoplastic laminates under edgewise charpy testing
TT  - Edgewise charpy testi altinda CPP ve PET bazlı hibrit termoplastik laminatların darbe dayanıklılığı
AU  - Pulgu, Nida
AU  - Erkliğ, Ahmet
PY  - 2025
DA  - November
Y2  - 2025
DO  - 10.5505/pajes.2025.55874
JF  - Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi
PB  - Pamukkale Üniversitesi
WT  - DergiPark
SN  - 2147-5881
VL  - 32
IS  - 2
LA  - en
AB  - 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.
KW  - Charpy impact test
KW  - Fiber-reinforced thermoplastics
KW  - Impact toughness
KW  - Hybrid composites
KW  - Absorbed energy
N2  - Bu çalışmada, cam, karbon ve hibrit elyaf istifleme dizileriyle güçlendirilmiş döküm polipropilen (CPP) ve polietilen tereftalat (PET) matrislerden yapılmış lamine termoplastik kompozitlerin Charpy darbe karakteristikleri incelenmektedir. Kompozit malzemeler için laminatlar, filmlerin istiflenmesi ve sıcak preslenmesi, ardından kesilmesi ve ardından ISO 179-1 direktiflerine göre test edilmesi işlemi kullanılarak üretilmiştir. Charpy darbesi, hem darbe enerjisi hem de tokluk ölçümleri için her konfigürasyondaki beş numune üzerinde gerçekleştirildi. Veriler, hem matris plastisitesinin hem de istifleme dizisinin darbe tepkisini büyük ölçüde etkilediğini göstermektedir. CPP kompozitleri, karbon için 7.2 J ve cam için 5.4 J'lik düz konfigürasyonlara karşı en iyi tokluğu gösterirken, hibritler camkarbon-cam için 7.26 J ve karbon-cam-karbon için 6.65 J'ye ulaşmıştır. PET kompozitler, hem karbon hem de cam için 4.5 J'lik standart konfigürasyonlarda daha az tokluk taşırken, hibrit karbon-cam-karbon konfigürasyonu tokluğu 7.45 J'ye çıkardı. CPP_GCG laminatı, PET_G'den yaklaşık %86 daha fazla enerji emerken, CPP kompozitleri incelenen tüm istifleme yapıları için PET kompozitlerinden %30-35 daha fazla enerji emdi. Numunelerin fraktografisi, CPP kompozitleri için sünek kırılmanın ve PET kompozitleri için gevrek kırılmanın meydana geldiğini doğruladı. Veriler, darbelere karşı tokluğu ve lamine kompozitler için hasar toleransını artırmak için sünek bir matrisi hibrit istifleme yapılarıyla birleştirmenin etkinliğini göstermektedir.
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UR  - https://doi.org/10.5505/pajes.2025.55874
L1  - https://dergipark.org.tr/tr/download/article-file/5382024
ER  -