Article Per Year (5 Year)
p-Index From 2021 - 2026
0.408
P-Index
This Author published in this journals
All Journal JURUTERA (Jurnal Umum Teknik Terapan) Jurnal Polimesin
Yakob, Iskandar
Unknown Affiliation
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
PENGARUH PENGGUNAAN KOIL STANDAR DAN KOIL RACING DENGAN PENAMBAHAN KABEL GROUNDING TERHADAP UNJUK KERJA MESIN PADA SCORPIO Z 225 Wiryadinata, Fahry; A. Abdullah, Nasruddin; Bahri Widodo, Syamsul; Yakob, Iskandar
JURUTERA - Jurnal Umum Teknik Terapan Vol 12 No 01 (2025)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v12i01.11608

Abstract

This study aims to determine the effect of using standard coils, racing coils, and racing coils with the addition of grounding cables on the performance of the Scorpio z 225 engine. Variations in the type of ignition coil with the addition of grounding cables are used to evaluate their impact on engine performance such as torque, power, fuel consumption, AFR, volumetric efficiency, thermal efficiency and ignition mass resistance. The results of the experimental test showed that the use of a racing ignition coil with the addition of a grounding cable obtained the highest torque and power at 8000 rpm, which were 19.21 Nm and 16.05 kW, respectively. Fuel consumption is also more efficient due to the use of a racing ignition coil with the addition of a grounding cable because combustion becomes more perfect. The use of a racing ignition coil and grounding cable can also provide better AFR than a standard ignition coil. The use of a racing ignition with the addition of a grounding cable provides the highest values ​​for volumetric efficiency and thermal efficiency at 8000 rpm of 62.8% and 42.99%. The lowest ignition mass resistance is also obtained from the use of a grounding cable with a value of 7.6 ohms at 8000 rpm.
Evaluation of mechanical and ballistic properties of abaca–polyester composites as a candidate material for bulletproof vests Arif, Zainal; Adlie, Taufan Arif; Yakob, Iskandar; Widodo, Syamsul Bahri; Suheri, Suheri; Ritonga, Abriandi Sahputera; Sariyusda, Sariyusda
Jurnal Polimesin Vol 23, No 5 (2025): October
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i5.7769

Abstract

This study aims to analyze the mechanical and ballistic properties of abaca (Musa textilis) fiber–reinforced polyester (BQTN 157) composites as an alternative candidate material for bulletproof vest panels. Variations in fiber orientation (bias-woven fiber, straight-woven fiber, and straight fiber) and fiber mass fractions (10%, 20%, and 30%) were applied to evaluate their influence on tensile strength, impact toughness, and ballistic response. The tensile test results revealed that the straight fiber alignment at a 10% mass fraction exhibited the best tensile strength of 54.12 MPa, strain of 0.021 mm/mm, the toughness of 43.90 kJ/m2, and an elastic modulus of 2577 MPa. In the impact test, the same configuration achieved the maximum absorbed energy of 2.70 J. The ballistic testing with 9 mm FMJ projectiles (NIJ Level IIIA) demonstrated that all specimens with thicknesses of 15 mm and 20 mm experienced full penetration. The dominant failure mechanisms included delamination, fiber pull-out, matrix fracture, and shear plugging. These findings indicate that although abaca fiber composites possess good mechanical performance and sustainability advantages, further material engineering strategies—such as hybridization with synthetic fibers or the addition of ceramic/metallic layers—are required to enhance their ballistic resistance. Abaca–polyester composites require hybridization with synthetic fibers or additional protective layers to be viable for ballistic applications.
Co-Authors A. Abdullah, Nasruddin Arif, Zainal Ritonga, Abriandi Sahputera Sariyusda, Sariyusda Suheri Widodo, Syamsul Bahri Wiryadinata, Fahry