Sem Analysis Of Fracture In Impact Testing Of Kenaf/Pp Composite Material Produced By 3D Printin

Febriansyah, Muhammad Daffa (2026) Sem Analysis Of Fracture In Impact Testing Of Kenaf/Pp Composite Material Produced By 3D Printin. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Komposit polipropilena yang diperkuat serat alam (Kenaf/PP) semakin menarik perhatian sebagai material berkelanjutan untuk proses Fused Deposition Modelling (FDM). Namun, penerapannya masih terbatas oleh ketidakkonsistenan performa impak akibat mekanisme patahan dan cacat struktur internal. Penelitian ini bertujuan untuk mengkarakterisasi morfologi filamen Kenaf/PP 3 wt% dan 5 wt%, menganalisis morfologi permukaan patahan spesimen komposit Kenaf/PP hasil 3D printing setelah pengujian impak Izod, serta mengevaluasi hubungan antara apparent void area dan kekuatan impak. Pengujian impak dilakukan sesuai ASTM D256. Karakterisasi permukaan patahan menggunakan Scanning Electron Microscopy (SEM), sedangkan apparent void area dianalisis dari citra mikroskop digital menggunakan ImageJ. Sebanyak 59 data pengukuran dari 54 spesimen patah dianalisis menggunakan regresi linear sederhana. Hasil penelitian menunjukkan bahwa filamen Kenaf/PP 3 wt% memiliki morfologi yang lebih homogen, permukaan yang lebih halus, dan kontinuitas matriks yang lebih baik dibandingkan filamen 5 wt%. Pengamatan SEM menunjukkan bahwa spesimen optimasi didominasi karakteristik patahan ulet (ductile fracture), sedangkan spesimen dengan kekuatan impak terendah didominasi karakteristik patahan getas (brittle fracture). Analisis regresi linear menunjukkan adanya hubungan berbanding terbalik yang signifikan secara statistik (p < 0,05) antara apparent void area dan kekuatan impak, sehingga spesimen dengan apparent void area yang lebih besar cenderung memiliki kekuatan impak yang lebih rendah. Hasil penelitian ini menunjukkan bahwa pengurangan apparent void serta peningkatan morfologi patahan berkontribusi terhadap peningkatan performa impak komposit Kenaf/PP hasil proses FDM
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Natural fibre-reinforced polypropylene (Kenaf/PP) composites have attracted increasing attention as sustainable materials for Fused Deposition Modelling (FDM). However, their application remains limited by inconsistent impact performance caused by fracture-related failure mechanisms and internal structural defects. This study aims to characterize the morphology of 3 wt% and 5 wt% Kenaf/PP filaments, investigate the fracture surface morphology of selected 3D-printed Kenaf/PP composite specimens after Izod impact testing, and evaluate the trend between apparent void area and impact strength. Izod impact testing was conducted in accordance with ASTM D256. Fracture surface characterization was performed using Scanning Electron Microscopy (SEM), while the apparent void area was quantified from digital microscope images using ImageJ. A total of 59 measurements obtained from 54 fractured specimens were analysed using simple linear regression. The results show that the 3 wt% Kenaf/PP filament exhibited a more homogeneous morphology, smoother surface, and better matrix continuity than the 5 wt% filament. SEM observations revealed that the optimized specimen exhibited predominantly ductile fracture characteristics with greater plastic deformation and energy absorption, whereas the lowest impact strength specimen exhibited predominantly brittle fracture characteristics associated with rapid crack propagation. Linear regression analysis identified a statistically significant inverse trend between apparent void area and impact strength (p < 0.05), indicating that specimens with larger apparent void areas generally tended to exhibit lower impact strength. These findings suggest that reducing apparent void formation and improving fracture morphology contribute to enhanced impact performance in FDM-printed Kenaf/PP composites.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Komposit Kenaf/PP, Fused Deposition Modelling (FDM), Scanning Electron Microscopy (SEM), morfologi patahan, apparent void area, kekuatan impak. ============================================================ Kenaf/PP composite, Fused Deposition Modelling, Scanning Electron Microscopy, Impact test, Apparent void area, Fracture morphology.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA169.5 Failure analysis T Technology > TA Engineering (General). Civil engineering (General) > TA418.9 Composite materials. Laminated materials. T Technology > TS Manufactures
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Muhammad Daffa Febriansyah
Date Deposited:	31 Jul 2026 02:01
Last Modified:	31 Jul 2026 02:01
URI:	http://repository.its.ac.id/id/eprint/140358

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