Bulut M., Bozkurt Ö. Y., Erkliğ A., Abdo A. R.
INTERNATIONAL POLYMER PROCESSING, cilt.40, sa.5, ss.636-648, 2025 (SCI-Expanded, Scopus)
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Yayın Türü:
Makale / Tam Makale
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Cilt numarası:
40
Sayı:
5
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Basım Tarihi:
2025
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Doi Numarası:
10.1515/ipp-2025-0092
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Dergi Adı:
INTERNATIONAL POLYMER PROCESSING
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Derginin Tarandığı İndeksler:
Scopus, Science Citation Index Expanded (SCI-EXPANDED), Chemical Abstracts Core, Compendex
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Sayfa Sayıları:
ss.636-648
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Sivas Cumhuriyet Üniversitesi Adresli:
Evet
Özet
Abstract
This study investigates the synergistic enhancement of Mode I and Mode II interlaminar fracture toughness (G
IC
and G
IIC
) in basalt/Kevlar hybrid fiber-reinforced epoxy composites through multiwall carbon nanotube (MWCNT) integration. Hybrid laminates with two stacking sequences (B5K10B5 and K5B10K5) were fabricated via vacuum-assisted resin transfer molding (VARTM), incorporating MWCNTs at 0.1, 0.25, and 0.5 wt.% in the epoxy matrix. Fracture behavior was characterized using double cantilever beam (DCB) and end-notched flexure (ENF) tests, complemented by scanning electron microscopy (SEM) to elucidate failure mechanisms. Key results demonstrate that 0.1 wt.% MWCNTs optimally enhanced fracture resistance: K5B10K5 composites achieved 32.9 % G
IC
improvement (923.42 J m
−2
) and 22.9 % G
IIC
increase in mode II fracture toughness. B5K10B5 composites exhibited superior baseline G
IC
(998.61 J m
−2
vs. K5B10K5’s 619.47 J m
−2
) but lower G
IIC
sensitivity to MWCNTs. Performance degradation occurred at 0.5 wt.% MWCNTs due to agglomeration, reducing G
IC
by 22.5 % in B5K10B5. Conversely, K5B10K5 showed exceptional G
IIC
(4481.06 J m
−2
) at 0.5 wt.%, attributed to crack bifurcation and shear-induced frictional sliding. SEM analysis confirmed that MWCNTs enhance toughness via crack bridging and fiber-matrix interlocking at optimal dispersion (0.1 wt.%), while agglomerates degraded Mode I performance but partially increased Mode II resistance.