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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control) Rekayasa Mesin ROTOR: JURNAL ILMIAH TEKNIK MESIN ELINVO (Electronics, Informatics, and Vocational Education) Journal of Energy, Mechanical, Material and Manufacturing Engineering at-tamkin: Jurnal Pengabdian kepada Masyarakat Jurnal Teknologi Terapan International Journal of Mechanical Engineering Technologies and Applications (MECHTA) GMPI Conference Series TEKAD : Teknik Mengabdi
Moch. Agus Choiron
Universitas Brawijaya
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Other

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Optimasi Parameter Desain Multi-Cell Hexagonal Crash Box terhadap Absorbsi Energy Impact dengan Metode Taguchi Rismanto, Muhammad; Choiron, Moch. Agus; Sugiono, Sugiono
Jurnal Rekayasa Mesin Vol 11, No 3 (2020)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2020.011.03.15

Abstract

The crash box is a passive safety system placed between the bumper and the mainframe of the car that functions as an energy absorber to reduce the impact of driving accidents. The purpose of this study is to determine the optimal level of factors and analyze the factors that provide the most significant effect on energy absorption in a multi-cell hexagonal crash box. Identification of parameters that affect the crash box in energy absorption, namely: the position of placement hole (P), the distance of position hole (L), the thickness of crash box (t), and the hole diameter (D). The modeling method has used the design of the crash box by utilizing a computer simulation with software ANSYS 17.0. This research uses aluminum material type AA 6061-T4 and impactor material uses structural steel. Modeling loading using the frontal crash test method. In this modeling, the impactor with a speed of 7.67 m/s with a deformation length of 100 mm. This research uses the experimental design of the Taguchi method with the L27 orthogonal array. The optimization result were obtained optimum design parameter multi-cell hexagonal crash box with parameter settings P = inner wall; L = 112.5 mm; t = 2 mm, and D = 6.6 mm. Based on the calculated F value ≥ F Table, the factors P, t, and D affect the ability to absorb energy. Thickness crash box (t) has the highest contribution of 98.10% in increasing the value of energy absorption.
Pengaruh Double Chamfer terhadap Distribusi Suhu dan Daerah Zpl pada Sambungan Las Gesek AL6061 dengan Simulasi Komputer Nadya, Mesti; Irawan, Yudy Surya; Choiron, Moch. Agus
Jurnal Rekayasa Mesin Vol 12, No 2 (2021)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2021.012.02.20

Abstract

Welding is one of the metal joining processes in manufacturing. CDFW (continuous drive friction welding) is a welding process to join two workpieces by applying pressure at one end of the object and rotating another one where the friction action applies at interface. The purpose of this study is to study temperature distribution on the surface of the welding area and the heat-affected zone represented by a fully plasticized zone (Zpl) and to get an insight of a friction welding process. The variables of CDFW used were double chamfer angle, upset pressure, and burn off  length. The initial area of friction was equal that is at a diameter of 14 mm. The method of modeling the CDFW friction welding is via computer simulations using ANSYS 18.1 software. This research uses aluminum material type Al6061. The Taguchi method was applied in designing the simulations. In this modeling, the model with the double chamfer of 15 °, the upset pressure of 120 MPa, and the burn-off length of 9 mm has a small ZPl area of 10.256 mm2. Whilst the specimen model, with a double chamfer angle of 45 °, the upset pressure of 240 MPa,   and the burn-off length of 7 mm has a large Zpl area of 56.55mm2. The area of a narrow fully plasticized area caused by small chamfer angle and an upset pressure of 240 MPa. The area of fully plasticized zone shows how much material can be integrated during the friction welding process and how much strength of the weld metal. The model with the chamfer angle of 15 º,   the upset pressure of 240 MPa, and the burn-off length of 9 mm has the widest temperature distribution and the highest maximum temperature. Meanwhile, the model with the chamfer angle of 30º, the upset pressure of 120 MPa, and the burn-off length of 9 mm has the narrowest temperature distribution and the lowest maximum temperature. The smaller chamfer angle increased upset pressure and burn-off length result in the wider temperature distribution, higher maximum temperature, and smaller Zpl.
Matching algorithm performance analysis for autocalibration method of stereo vision Raden Arief Setyawan; Rudy Soenoko; Moch Agus Choiron; Panca Mudjirahardjo
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 18, No 2: April 2020
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v18i2.14842

Abstract

Stereo vision is one of the interesting research topics in the computer vision field. Two cameras are used to generate a disparity map, resulting in the depth estimation. Camera calibration is the most important step in stereo vision. The calibration step is used to generate an intrinsic parameter of each camera to get a better disparity map. In general, the calibration process is done manually by using a chessboard pattern, but this process is an exhausting task. Self-calibration is an important ability required to overcome this problem. Self-calibration required a robust and good matching algorithm to find the key feature between images as reference. The purpose of this paper is to analyze the performance of three matching algorithms for the autocalibration process. The matching algorithms used in this research are SIFT, SURF, and ORB. The result shows that SIFT performs better than other methods.
Energy Absorption and Deformation Pattern Analysis of Initial Folded Crash Box Subjected to Frontal Test Moch. Agus Choiron; Zumrotul Ida; Anindito Purnowidodo; Ahmad Rivai
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 2 No. 1 (2017)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v2i1.4689

Abstract

Crash box design as one of the passive safety components in a vehicle had been developed to enhance energy absorption. Initial fold on the crash box is set to facilitate folding during the crash. The aims of this study is to investigate the initial folded crash box with length to thickness ratio subjected to frontal test. The frontal test is modelled by using finite element analysis. Through computer simulation using 9 models, the obtained result was used to provide the better design of crash box. The variations in this study were length to thickness ratio of crash box with length of tube (L) = 115; 132.5; 150 mm and the thickness of tube (t) = 1.6; 2.0; 2.5 mm. The crash box material was assumed as bilinear isotropic hardening material. The velocity used in the simulations was 7.67 m/s with impact mass of 103 kg. Based on the results, it can be shown that 1st model to 8th model produce deformation pattern as concertina mode and 9th model has diamond mode. The 3rd model has the largest energy absorption with value 18.29 kJ.
THE INFLUENCE OF PROCESS PARAMETERS TOWARD COLLAR HEIGHT ON INCREMENTAL BACKWARD HOLE-FLANGING PROCESS Muhammad Fakhruddin; Mochammad Agus Choiron; Anindito Purnowidodo
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 2 No. 1 (2017)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v2i1.4899

Abstract

Abstract                  The experimental study of the influence of process parameters towards collar height on incremental backward hole-flanging (IBHF) process with aluminium plate workpiece was presented in this paper. The effect of process parameters toward collar height which produced by IBHF process was investigated. Experiments were performed with a CNC machine, a 30o conical forming tool, and aluminium plates. The process parameters are feed speed with two levels, radial forming step size with three, and axial forming step size with three levels. Some parameters were kept constant, i.e., spindle speed, initial hole diameter, final hole diameter, and conical forming tool diameter. Digital Vernier caliper was used to measure the height of the collar. Experimental results of IBHF process have shown that the feed speed (vf) parameter has no effect toward collar height. Increased radial forming step size (Δx/y), increased the collar height also. Increased the axial forming step size (Δz) reduced the collar height. Keywords: hole-flanging, incremental sheet metal forming, incremental backward.
Surface Modification with Silane Coupling Agent on Tensile Properties of Natural Fiber Composite Willy Artha Wirawan; Sofyan Arief Setyabudi; Teguh Dwi Widodo; Moch. Agus Choiron
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 2 No. 2 (2017)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v2i2.5053

Abstract

Biocomposite is an innovation of renewable material in engineering made from the bark fiber of waru (Hibiscus tiliaceus, the bark is environmentally friendly and has the potential to be developed. The purpose of this study is to modify biocomposite by adding methacryloxypropyltrimethoxysilane-coupling agent on waru bark fiber (Hibiscus tiliaceus) as an effort to improve tensile properties. Waru bast fibers, as reinforcement, were prepared by alkali procces using 6% NaOH solution for 120 minutes and then added 0.75% coupling agent and  ordered using continous fibers with 0°/0°, 0°/90° and 45°/45° orientation. After that, the Biocomposites  were formed with a polyester matrix using Vacuum Pressure Resin Infusion (VAPRI) method. The results of SEM tested showed the quality improvement of the bonds bringing significant impact on the tensile properties of the waru bark biocomposite. On the continous fiber 0°/90° orientated  showed that the highest strength was 401.368 MPa, while biocomposites with 45°/45° orientation has lowest tensile strength of 65.243 MPa
Effects of Origami Pattern Crash Box and Rectangular Pattern Crash Box on The Modelling Of MPV Car Structure on Deformation Imam Kusyairi; Moch. Agus Choiron; Yudy Surya Irawan; Helmy Mukti Himawan
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 3 No. 2 (2018)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v3i2.6831

Abstract

 Crash box serves as a kinetic energy absorber during collision. It has a tube shape, which is located between bumper and chasis. The crash box design requires development in order to reduce buckling mode and obtain symmetry folding mechanism, so it will achieve greater energy absortion. The researchers find a method to reduce tension due to impact by providing dents in crash box geometry. This research observed origami pattern crash box design having dents functioned as pre-folded so that collapse mode can be predicted and stable. In this research, the crash box was modeled according to the size of bumper and chassis on the MPV car. Testing simulation was performed by modelling Impactor as rigid body and crash box as flexible. Fixed support was housted in the surface of rear side of the crash box. Simulation process was started from the impactor moving to supress crash box. This Impactor collision led to deformation on the crash box. Crash box material was AA7004-T7, it was modelled as bilinier isotropic hardening. Based on the research result, the addition of pre folded pattern is able to reduce impact force at the first impact and has stable characteristic as well as predictable collapse mode. 
REKAYASA DESAIN CIRCULAR HYBRID CRASH BOX UNTUK PENINGKATAN PERFORMA KELAYAKAN TABRAK Wakhidah, Delia Hani; Choiron, Moch. Agus; Irawan, Yudy Surya
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.v15i3.1403

Abstract

In previous studies, hybrid crash boxes have been developed because it show better energy absorption characteristics. Circular hybrid crash box combine the advantages of low-density of composite with stable deformation of metal provide a potential energy absorption device. Tests were carried out experimentally and iumerically under frontal load. This study aims to determine the energy absorption characteristics of two different configuration of hybrid material compositions using Aluminum Alloy 6063 and T300-epoxy Carbon Fiber composites. Present two typical configurational schemes, namely Al-Ko (i.e. a metal outer tube internally filled with an inner carbon fiber reinforced plastic (CFRP) tube) and Ko-Al (i.e. an outer composite tube internally filled with an inner metal tube). Composite layups arrangement with fiber orientation direction [0,90]10. First, the simulation models were developed and validated by comparing the damage modes and crashworthiness indictors with the dedicated experimental study. Second, the interactive effects of different configuration hybrid tubes were investigated by analyzing the discrepancies in the deformation pattern and internal energy absorption of each material through the validated simulation models. The test results show that the greatest energy absorption occurs in the Al-Ko model of 7401.4 J. This hybrid crash box has an energy absorption value of 11% greater compared to the sum of the energy absorption of aluminum tubes (3746.5 J) and composite tubes (2923.4 J).
MENGUBAH UMPAN BALIK REVIEWER MENJADI PENERIMAAN: STRATEGI PENDAMPINGAN PENULISAN ILMIAH BAGI AKADEMISI DI LINGKUNGAN PERGURUAN TINGGI NAHDLATUL ULAMA Choiron, Moch. Agus; Suyono, Hadi; Wijatmiko, Indradi; Ari, Ismu Rini Dwi; Santosa, Herry; Maulana, Eka; Dika, Johan Wayan; Putra, Fatra Nonggala
Jurnal Pengabdian Kepada Masyarakat Vol 7 No 2 (2024): At-Tamkin - Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Islam Raden Rahmat Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33379/attamkin.v7i2.6109

Abstract

ABSTRACT Salah satu indikator kinerja perguruan tinggi adalah jumlah, kualitas, dan sitasi publikasi ilmiah dosen, yang berdampak pada pemeringkatan perguruan tinggi di tingkat nasional maupun internasional. Program Pengabdian kepada Masyarakat ini dirancang untuk membantu perguruan tinggi di bawah Lembaga Pendidikan Tinggi Nahdlatul Ulama di Indonesia melalui model konsinyering penulisan publikasi ilmiah yang telah diterapkan di Universitas Brawijaya sejak 2018. Program dengan tema “Mengubah Umpan Balik Reviewer Menjadi Penerimaan: Panduan Revisi Artikel untuk Publikasi di Jurnal Internasional Bereputasi” dilaksanakan di Universitas Nahdlatul Ulama Blitar, bertujuan meningkatkan kemampuan dan motivasi dosen dalam mempublikasikan artikel ilmiah. Pelaksanaannya melibatkan tahapan sosialisasi, rekapitulasi draft artikel, pemilihan reviewer dan pendamping, pemberian umpan balik, hingga pendampingan penulisan. Hasil program menunjukkan bahwa kegiatan ini berhasil meningkatkan pengetahuan, motivasi, dan keterampilan peserta. Kompetensi pemateri dan efektivitas model pendampingan mendapatkan apresiasi tinggi, meskipun peserta menyarankan peningkatan durasi untuk mendalami aspek teknis publikasi. Program ini membuktikan bahwa pendekatan pendampingan terstruktur efektif mendukung dosen dalam menghadapi tantangan publikasi di jurnal internasional bereputasi. Keywords: Publikasi Ilmiah, Konsinyering, Umpan Balik Reviewer
Multi-Objective Optimization of MEMS-based Box Pattern Microheaters Using Response Surface Method Setyawati, Onny; Choiron, Moch. Agus; Bangert, Axel; Sandhagen, Carl
Elinvo (Electronics, Informatics, and Vocational Education) Vol. 9 No. 2 (2024): November 2024
Publisher : Department of Electronic and Informatic Engineering Education, Faculty of Engineering, UNY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/elinvo.v9i2.77133

Abstract

We present a response surface method to evaluate multi-objective optimization for MEMS-based microheater design. Box pattern, the standard microheater shape, was selected in this study since it has a uniform temperature distribution compared to other patterns. The optimum parameters are used to obtain the maximum total current density and Joule heat.  Based on a hybrid of the Response Surface Method and Central Composited Design, the model simulation emerged with 25 sets of Design Experiments.  As expected, the voltage is proportional to the increased output temperature and Joule heat of the microheater. Material thermal conductivity, anchor length and thickness of the heating element are included as design variables for the optimization. The microheater thicknesses of 4.23 - 4.55 µm, length of 40 µm and thermal conductivity of materials of approximately between 52 to 66 Wm-1K-1 became the optimized results at 1 V input voltage to obtain a maximum Joule heat of 4.9x105 W/mm3 and total current density of 5.6x107 mA/mm2.
Co-Authors A.A. Ketut Agung Cahyawan W Abdul Hadi Djaelani, Abdul Hadi Achfas Zacoeb Agung Sugeng Widodo Agustinus Ariseno Ahmad Rivai Aji Hendra Sarosa Andika Prasetyo Anggriawan, Ongki Budi Anindito Purnowidodo Anindito Purnowidodo Asroni Asroni Asroni, Asroni Avita Ayu Permanasari Bangert, Axel Bintang Rahmaddian Anwari, Bintang Rahmaddian Dika, Johan Wayan Djarot B. Darmadi, Djarot B. Djuanda, Dagus Resmana Eko Budianto EKO BUDIYANTO FATRA NONGGALA PUTRA Fauzi, Katanda Fajar Hadi Suyono Halman, Halman Helmy Mukti Himawan Helmy Mukti Himawan, Helmy Mukti Herry Santosa Hidayati, Nafisah Arina Ida, Zumrotul Imam Kusyairi Imam Kusyairi, Imam Indradi Wijatmiko Ismi Choirotin Ismu Rini Dwi Ari Jatmiko Awali Jatmoko Awali Lilis Yuliati Lin, Jing Chie M. Fahrur Rozy Hentihu Maulana, Eka Mohamad Irkham Mamungkas Muhammad Fakhruddin Musyaffa, Dzikri Amali Nadya, Mesti Onny Setyawati Panca Mudjirahardjo Pratama, Fajar Adi Raden Arief Setyawan Redyarsa Dharma Bintara Rismanto, Muhammad Rivai, Ahmad Rudy Soenoko Safari, Rachmat Sandhagen, Carl sarip, sarip Shiddieqy, M. Hasbi Ash Sofyan Arief Sofyan Arief Setyabudi Solikhin, Atfalus Solikhin Sudjito Soeparman Sugiono Sugiono Taryono, Taryono Teguh Dwi Widodo Totok Tri Prasetyo Tri Budi Prayogo, Tri Budi Wahyono Suprapto Wakhidah, Delia Hani Widodo, Teguh Dwi Wirawan, Willy Artha Yudy Surya Irawan Zakariya, Yahya Zumrotul Ida