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All Journal Journal of Energy, Mechanical, Material and Manufacturing Engineering Jurnal Teknologi Terapan JTIK (Jurnal Teknik Informatika Kaputama) Jurnal Mekanik Terapan Jurnal Polimesin Recent in Engineering Science and Technology
Muslimin Muslimin
Department Of Mechanical Engineering, Politeknik Negeri Jakarta, Jl. Prof. G. A. Siwabessy, Kampus UI, Depok 16425, INDONESIA
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Journal : recent in engineering science and technology

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The Effect of 5wt.% and 10wt.% Salacca Frond Fiber Addition on Kevlar and Carbon Fiber Reinforced Epoxy using Vacuum Assisted Resin Transfer Molding (VARTM) Method for Bulletproof Vest Application Vina Nanda Garjati; Vika Rizkia; Nur Agnes Aggraeni; Muslimin
Recent in Engineering Science and Technology Vol. 1 No. 3 (2023): RiESTech Vol. 1 No. 3 Years 2023
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v1i03.27

Abstract

Bulletproof vests as self-protection for military personnel are generally made from synthetic fiber-reinforced composites. Kevlar and carbon fiber reinforced composites have been able to withstand bullet penetration rates and have lightweight characteristics, but production costs with synthetic fibers are relatively expensive. The use of substitute materials from natural fiber is very potential, due to the abundance of natural fiber, lightweight, and relatively cheap price. One of the potential natural fibers is fiber from the salacca midrib. This study focused on the effect of adding salacca frond fiber on the composite characteristics of Kevlar fiber and carbon fiber, with SiC and Al2O3 fillers. The manufacture of this composite is carried out by the Vacuum Assisted Resin Transfer Molding (VARTM) method. There are 4 variations of fiber volume fractions and fillers as reinforcement added to this composite. From the results of observations with SEM, the results of the matrix and reinforcement are well bound. The ballistic test results show that all variations of test samples can withstand the bullet rate so that it does not penetrate. The results of mechanical tests show that currently the addition of salacca frond fiber has not significantly improved the mechanical properties of the composite
Analysis of the Effect of Infill Density on the Hard Strength of 3D Printing Azam Muhamad; Muhammad Farhan; Muslimin; Aini Zuhra Abdul Kadir
Recent in Engineering Science and Technology Vol. 2 No. 4 (2024): RiESTech Vol. 2 No. 4 Years 2024
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v2i04.83

Abstract

3D printing technology is becoming one of the most convenient fabrication methods and is bringing about major changes in the manufacturing industry. 3D printing with Fused Deposition Modeling technology makes it possible to produce prototypes and components in a shorter time. It is known that different materials, printing techniques, and printing parameters affect the mechanical properties of printed objects. However, studies on the mechanical properties of 3D printed structures are still limited. This research focuses on the use of thermoplastic materials such as Polypropylene, Acrylonitrile Butadiene Stryrene and plastic composites with glass fiber reinforcement and maleic anhydride, in producing filaments for printing lighter vehicle components. This research conducted a further study of the relationship between two molding parameters, namely infill pattern and infill density, conducted on filament materials that have been determined for their composition. This research uses experimental method by varying five types of infill pattern selected grid, gyroid, hexagon, concentric, cubic with two infill density denisty 50% and 75%. The results were obtained through Brinell hardness testing with ASTM-D785 reference standard. The test results showed that the concentric pattern with sample code B2 got the highest hardness value of 37.7023 Kgf/mm², while the lowest hardness value was obtained by the grid pattern with sample A1 at 16.5912 kgf/mm².
Co-Authors Adhi, Pribadi Mumpuni Aini Zuhra Abdul Kadir Anang Wahyu Setiawan Azam Milah Muhamad Azam Muhamad Bayu Pambudi Darius Yuhas Dhiya Luqyana Ghany Heryana Hasvienda M. Ridlwan Hasvienda Mohammad Ridlwan Ivinia Muthia Anjani Katerina Mukti Lisbhet Engelita M. Rizki Fadillah Muhammad Farhan Noor Hidayati Nur Agnes Aggraeni Raden Grenny Sudarmawan Sholeh Mochammad Sonki Prasetya Sugeng Mulyono Uswah Hasanah Vika Rizkia Vina Nanda Garjati