Analisis Pengaruh Variasi Fraksi Volume Terhadap Kekuatan Impak Komposit Hybrid Berpenguat Serat Sabut Kelapa Dan Ampas Tebu
Keywords:
hybrid composite, coconut fiber, sugarcane fiber, charpy impact testAbstract
Indonesia, as a tropical country, has great potential in the development of natural fiber-based materials, such as coconut coir fiber and sugarcane bagasse fiber. This research aims to analyze the maximum impact strength of hybrid composite materials reinforced with coconut and sugarcane fibers, examine the effect of fiber volume fraction variation on the impact strength of the hybrid composite, and evaluate the potential of this composite material as an alternative substitute for SNI-standard helmet materials. The composite was fabricated using the hand lay-up method with polyester resin as the matrix and varying fiber volume fractions of coconut coir and sugarcane bagasse as reinforcements. Prior to mixing, the fibers were treated with a 5% NaOH alkali solution for 2 hours to enhance the bonding between the fibers and the matrix. Impact testing was carried out using the Charpy method in accordance with ASTM D6110 standards. The results showed that the highest impact strength was achieved at a composition of 40% coconut fiber, 20% sugarcane fiber, and 40% resin, resulting in an average impact strength of 0,2903 J/mm ², exceeding the SNI helmet impact value of 0,00972 J/mm ². Furthermore, the variation in fiber volume fraction influenced the impact strength, where an increase in fiber content up to an optimum point enhanced the strength, but excessive content led to a decline due to uneven stress distribution. Based on these findings, the hybrid composite of coconut and sugarcane fibers demonstrates strong potential as an eco-friendly alternative material for protective applications such as lightweight helmets.References
Ali, M. (2011). Coconut fibre: A versatile material and its applications in engineering. Journal of Civil Engineering and Construction Technology, 2(9), 190–197. https://doi.org/10.5897/JCECT
Apriani, E. (2017). Analisa Pengaruh Variasi Komposisi Bahan Limbah dari Serat Kelapa Muda, Batang Pisang dan Kertas Bekas terhadap Kekuatan Bending sebagai Papan Komposit. Jurnal ENGINE: Energi, Manufaktur, Dan Material, 1(2), 38–46.
ASTM International. (2010). Standard Test Method for Determining the Charpy Impact Resistance of Notched Specimens of Plastics. Mannual Book of ASTM Standards, 10(April), 1–17. https://doi.org/10.1520/D6110-10
Derianto, R. (2024). Rancang Bangun Alat Uji Impact 100 Joule Type Charpy Skala Laboratorium. Jurnal Teknologi Rekayasa Teknik Mesin (JTRAIN), 5(2), 19–24.
Direktorat Jenderal Perkebunan. (2024). Statistik perkebunan jilid I 2022-2024. In Angewandte Chemie International Edition, 6(11), 951–952. (1st ed.).
Gibson, R. F. (2007). Principles of Composite Material Mechanics. In Principles of Composite Material Mechanics (3rd ed.). CRC Press (Taylor & Francis Group). https://doi.org /10.1201/9781420014242
Khoso, S., Karim Bhatti, N., Tayyab Naqash, M., Sohoo, N., Ali Jamro, I., Azeem Cheema, F., Ul Kareem Bhatti, N., & Aziz Ansari, A. (2022). Utilization of Sugarcane Bagasse Ash to Improve Mechanical Properties and Producing a Sustainable Concrete. IJCSNS International Journal of Computer Science and Network Security, 22(4), 805–808. https://doi.org/10.22937/IJCSNS.2022.22.4.96
Mallick, P. K. (2007). Fiber Reinforced Composites: Materials, Manufacturing, and Design. In CRC Press, Taylor & Francis Group (3rd ed.). CRC Press, Taylor & Francis Group. https://doi.org/10.1201/9781420005981
Mohanty, A. K., Misra, M., & Drzal, L. T. (2001). Surface modifications of natural fibers and performance of the resulting biocomposites: An overview. Composite Interfaces, 8(5), 313–343. https://doi.org/10.1163/156855401753255422
International Organization for Standardization. (2023). Plastics - Determination of Charpy impact properties - Part 1: Non-instrumented impact test (3rd ed.). Switzerland.
