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All Journal Jurnal MEKANIKAL Rekayasa Mesin Journal of Mechanical Engineering Science and Technology Conference SENATIK STT Adisutjipto Yogyakarta Infotekmesin International Journal of Mechanical Engineering Technologies and Applications (MECHTA)
Muhammad Syaiful Fadly
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Aerospace Engineering Automotive Engineering Computer Science & IT Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Journal : Rekayasa Mesin

 1 
Karakteristik Fiber Metal Laminate Akibat Beban Impak Balistik Dari Peluru Kaliber 9 mm Full Metal Jacket (FMJ) Fadly, Muhammad Syaiful; Purnowidodo, Anindito; Setyarini, Putu Hadi
Jurnal Rekayasa Mesin Vol 12, No 1 (2021)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2021.012.01.12

Abstract

Estimated damage levels from ballistics impact zone provide valuable information to make bulletproof materials more effective. Therefore, this study aims to determine the impact of ballistics including hole shape, hole depth, macro, and microstructure on fiber metal laminate. The characteristics of ballistics impact for each configuration target is obtained from experiment and comparison based on simulations with finite element method. Test experiments used short-barreled fire guns at a distance of 5 meters with a normal attack angle based on the National Institute of Justice standard. Simulation with Johnson-Cook plasticity models for aluminum plate and orthotropic material model for kevlar/epoxy. The experiment and simulation results showed that the projectile is able to perforate the first layer (aluminum plate) and the second layer (Kevlar/epoxy) while the last layer (backplate) is deformed to form a bulge. The aluminum plate is perforated by the failure of petaling formation on the backside and spread of dimple fracture around the area of the petal which indicates ductile fracture while kevlar/epoxy is perforated by projectile with failure of fiber fracture on primary yarn, fiber pull-out, fiber stretching and fiber rupture.
EFFECT OF DRILLING PARAMETERS ON THRUST FORCE AND DELAMINATION DAMAGE OF DRILLED RAMIE WOVEN – COIR FIBER HYBRID COMPOSITES Chandrabakty, Sri; Fadly, Muhammad Syaiful; Nilasari, Sri
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1890

Abstract

This study examines the effect of spindle speed and feed rate variations on the delamination mechanism and thrust force of hybrid composite materials reinforced with ramie weave and coir fibers. The specimen was made with a volume fraction of 30%, consisting of 6 layers of woven ramie, with the remainder being coir. The drilling process is divided into four main phases, showing changes in thrust force at each stage. The results indicate that an increase in feed rate tends to increase thrust force and cause microstructural damage such as delamination and fiber pull-out. At a feed rate of 0.26 mm/rev and a spindle speed of 1500 RPM, the maximum thrust force is reached, indicating the most severe damage. The delamination factor is higher on the exit side compared to the entry side, especially at higher spindle speeds. Tensile tests show a significant decrease in the tensile strength of the composite material due to drilling, with the highest tensile stress achieved at a spindle speed of 1500 RPM and a feed rate of 0.1 mm/rev, although still lower than the sample without holes. The combination of high feed rate and high spindle speed increases the risk of material damage, but the proper selection of drilling parameters can help minimize damage and maintain the mechanical integrity of the composite material. This study provides important insights for industrial applications where mechanical strength and drilling efficiency are crucial.
CHARACTERISTICS OF SUGARCANE FIBER COMPOSITE REINFORCED WITH MALAPOGA WOOD COATING Sirajuddin, Awal Syahrani; Fadly, Muhammad Syaiful; Iqbal, Muhammad; Asmara, Anjar
Jurnal Rekayasa Mesin Vol. 16 No. 2 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i2.1944

Abstract

Rapid technological developments have led to an increased demand for composite materials. However, composite materials utilizing natural fibers, such as sugarcane bagasse fiber, have not been fully optimized. This study aimed to analyze the characteristics of sugarcane bagasse fiber-reinforced composites with a Malapoga wood coating, focusing on the Modulus of Elasticity (MOE) and Modulus of Rupture (MOR). The primary material used in this research was Malapoga wood (Toona Ciliata M. Roem), which was treated with a mixture of sugarcane bagasse fiber and epoxy in volume ratios of 30%:70%, 40%:60%, and 50%:50%. The composites were then coated with Malapoga wood under cold pressure. Specimens and bending strength testing procedures followed ASTM D143 standards. Macro photographs of the fracture cross-sections of the test specimens were taken to determine the failure mechanism. The test results indicated that the composite with a 50%:50% composition exhibited highest MOE and MOR values compared to the other compositions. The maximum modulus of elasticity (MOE) at 50% was 70,256.67 kg/cm², and for 50% MOR, it was 716.36 Kg/cm². The mixture of sugarcane bagasse fiber with epoxy produced a denser coating on the Malapoga wood.
EFFECT OF DRILLING PARAMETERS ON THRUST FORCE AND DELAMINATION DAMAGE OF DRILLED RAMIE WOVEN – COIR FIBER HYBRID COMPOSITES Chandrabakty, Sri; Fadly, Muhammad Syaiful; Nilasari, Sri
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1890

Abstract

This study examines the effect of spindle speed and feed rate variations on the delamination mechanism and thrust force of hybrid composite materials reinforced with ramie weave and coir fibers. The specimen was made with a volume fraction of 30%, consisting of 6 layers of woven ramie, with the remainder being coir. The drilling process is divided into four main phases, showing changes in thrust force at each stage. The results indicate that an increase in feed rate tends to increase thrust force and cause microstructural damage such as delamination and fiber pull-out. At a feed rate of 0.26 mm/rev and a spindle speed of 1500 RPM, the maximum thrust force is reached, indicating the most severe damage. The delamination factor is higher on the exit side compared to the entry side, especially at higher spindle speeds. Tensile tests show a significant decrease in the tensile strength of the composite material due to drilling, with the highest tensile stress achieved at a spindle speed of 1500 RPM and a feed rate of 0.1 mm/rev, although still lower than the sample without holes. The combination of high feed rate and high spindle speed increases the risk of material damage, but the proper selection of drilling parameters can help minimize damage and maintain the mechanical integrity of the composite material. This study provides important insights for industrial applications where mechanical strength and drilling efficiency are crucial.
Co-Authors Afrizal Abdi Musyafiq Anindito Purnowidodo Anjar Asmara Arrahim, Muhammad Ghazali Awal Syahrani Sirajuddin Bakri Bakri Bakri Bakri Hermanto, Muhammad Wahyu Hery Widijanto Khairil Anwar Muhammad Ghazali Arrahim Muhammad Ikram Kido Muhammad Iqbal Muhammad Sadat Hamzah Mustafa Nilasari, Sri Nurwijayanti Putu Hadi Setyarini Ramang Magga Sri Chandrabakty Wicaksono, Leo Hutri Wiwik Handayani