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DOI of the published article https://doi.org/10.21070/ups.10277
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Analysis of the Effect of Pressing Time Variation and Number of Carbon Fiber Layers in the Manufacturing Process of Composite Materials on Tensile Strength and Impact Properties

Analisis Pengaruh Variasi Waktu Penekanan dan Jumlah Lapisan Carbon Fiber dalam Proses Pembuatan Material Komposit terhadap Karakteristik Kekuatan Tarik dan Impack

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DOI:

https://doi.org/10.21070/ups.10277

Keywords:

carbon fiber composite, pressing time, number of layers, tensile strength, impact resistance

Abstract

This study investigates the influence of pressing time and the number of carbon fiber layers on the tensile and impact properties of composite materials. Specimens were produced using the hand lay-up method combined with pressing to improve laminate consolidation. Two layer variations (3 and 4 layers) and two pressing times (4 and 5 hours) were examined. Tensile tests following ASTM D638 Type I measured maximum tensile strength, elastic modulus, and elongation at break, while impact tests based on ISO 179-1 determined impact energy and toughness. Results indicate that increasing the number of layers improves tensile strength, while pressing time has little effect on tensile consistency. Specimens pressed for 4 hours showed more stable tensile behavior. However, longer pressing time and additional layers significantly enhanced impact energy absorption. Best impact resistance was achieved with 5-hour pressing and four layers. Overall, layer number governs tensile strength, while both parameters improve impact performance.

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2026-02-20

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